Niebel is a slim young, rather short boy with straight blue dark hair and thin eyebrows. The bangs of his hair are particularly prominent, covering part of his forehead, and exposing a side of it, due to the lack of hair present at the location. He has large blue eyes and a small, mildly round nose. Niebel has a black mark, similar to Sieg's, under his right eye reaching up to his forehead.
Niebel dons a green elaborated long sleeve open jacket, with lighter-colored edges, and golden zippers on either side of the jacket, reaching below his waist. Underneath, he wears a plain simple shirt loose around the bottom. Around his neck is a light scarf tied on the front in a large knot. Tied around his right arm is a wing-like object with three feathers springing forward. Surrounding his wrist, on both arms, are two moderately size dark-color bracelets. His legs are covered by loose, oval-shaped patterned pants, with lines intersecting at the middle, reaching down below his knees. Both his boots are decorated with ribbons, and are, surprisingly, husky. He is seen wearing glasses whilst flying on a Rune Wing.
Niebel is a kind boy who looks up to Sieg and respects him dearly, even to the point of rescuing him, Sieg, from prison after being called a traitor by Master Miltz. Unlike the residents of Mildian, Niebel does not look down on the human from the outside world, and believes that the duty the people of time carry, seems weird to him, since he is not originally from Mildian, as he states. He truly believes in Sieg's strength. Even though he is still very young, Niebel acts like a responsible adult, but at times he can be very childish. Niebel does not hold grudges, as shown when he happily accepts to join forces with Miltz and Hilde, but he expresses his feelings when he is angry towards the ones who insult Sieg's name, however.
When he fights Shakuma Raregroove, the worlds most powerful sorcerer, he is filled with fear knowing how strong Shakuma is. However, he later overcomes that fear and fights him alongside the others, with Shuda as his partner. When Sieg dies, he cannot hold his sorrow and cries his heart out. He speaks to others with respect and tries his best to support his friends, as showed when he encouraged Musica to make Haru a sword. He is also rather timid and tends to add "Mr" and "Ms" at the begging of people's name when he calls them.
Guardian of Time arc
Niebel, disguised as master Miltz, heads to Sieg Hart's temporary prison cell, and orders the guards to let Sieg out. Even though the gate keepers question "Miltz's" actions, being him the one who condemned Sieg to prison in the first place, they open the gates. As they walk through the prison hall, "Miltz" and another Miltz bump into each other. The Miltz that rescued Sieg uses a Mist spell, making mist appear, from the parent magic, Illusion Magic. "Miltz" tells Sieg to run, as he begins to undo the transformation. When the smokes clears, Sieg is both happy and surprise to see his old friend, Niebel. As they walk, Niebel tells Sieg to follow him.
Sieg suddenly asks Niebel what caused the town to change. However, Niebel corrects Sieg, stating that the one who has changed is him. He explains that before he, Sieg, left town all he ever thought about was killing the Etherion girl. Niebel also reveals that he is known as the traitor, and that he has been running away from the other Mages for two years. When they get out of the prison, they see a great amount of Mages ready to fight Sieg. Niebel tries to convince Sieg to avoid fighting a thousand Mages. Nonetheless, Sieg decides to fight.
Niebel watches Sieg, in awe, take down a thousand Mages with a magic blade. However, Niebel worries about Sieg's condition. When the battle is over, Haja and Miltz descend from the sky. Niebel is told to get back by Sieg. After Sieg takes Miltz down with one blow, Niebel realises that Sieg has been using the absorbing magic sword, Tickover. Sieg tells Niebel to get out of the town, while he can. At first, Niebel refuses but then, as Haja takes both himself and Sieg underground, he leaves town, waiting for Sieg to ascend.
After a week, Niebel is sitting under a tree, waiting for Sieg, when suddenly Hilde makes herself know. Hilde assures Niebel that Sieg is dead, Haja being his opponent. Nonetheless, Niebel contradicts her, and begins to ask her a series or questions. Miltz, coming from behind the tree, is confronted by an angry Niebel. Miltz decides to take Niebel and Hilde to Mildian's heart, to prove to Niebel that Sieg is most-likely to be dead. However, when they arrive they are left speechless with what they witness. The three see Haja and Sieg fighting, none stop for one whole week without food or water. Niebel grabs Miltz by the collar when he hears Miltz calling Sieg a "sacrifice." Niebel tells Miltz to stop and think about what his own words mean. After listening to Niebel's words, Hilda falls on the floor and begins to cry. Miltz recognizes his error and decides to help Sieg fight Haja alongside Niebel and Hilda.
Haja attacks Niebel and the others with one of his magic spells. He then watches as Miltz fights on behalf of his city, saying that he loves the city. Even though Miltz fights with all he has, he is easily taken down by Haja. However, Niebel's smile returns when he sees Sieg is fine. Seconds after Sieg stabs Haja with Miltz's cane, Niebel begins to cry when he notices that Haja plans to kill Sieg and not die alone. Niebel, Miltz, and Hilda are all heartbroken, thinking that Sieg lost his life. However, they are even more surprise when they see Haja's body come out from the water and when they see Demon Card's scientist, Igor Kilkil, come out of Haja's body. Niebel is pushed back by Igor, who grabs Hilda and threatens to kill her. Sieg suddenly comes out from the water and puts Igor to sleep. Niebel and the others are overjoyed to see him and all hug him at the same time. Niebel then scans Sieg's mind when he collapses due to exhaustion.
The Truth of Elie arc
Niebel lies on the ground, sobbing, when Shuda arrives at Mildian. He is picked up from the rubble and questioned by Shuda to where Sieg is currently located. Niebel tells him "Mildian's Heart," leading Shuda to question where exactly is that place located. However, before Niebel can say anything, he loses consciousness. Niebel, alongside Miltz, Hilde, Flicka, and some other Mages, aid the Rave Warriors in the search for Elie's memory. Moments later, Niebel, after being told that their ship is being fallowed by the worlds most powerful sorcerer, Shakuma Raregroove, alerts the others. He explains to them that Shakuma's power can alter the whole world. Knowing that they are no match for Shakuma, the Mages, not including Niebel, begin to cast a spell that will allow them to swiftly escape Shakuma. However, Niebel is dumbfounded when he notices that Shakuma was able to cast the spell all by himself and fallow them to their current location.
Niebel is left speechless once again when all of Shakuma's spells greatly damage their ship, even though the ship has a high defensive shield which protects it from magic spells. The Mages and the Rave warriors protect the ship and distract Shakuma whilst Elie, Haru, and Sieg head towards Resha Valentine's Grave. After fighting Shakuma for a long time, whilst flying on a Rune Wing, Niebel flies Shuda closer to Shakuma, in an attempt to slice him. However, proving himself a strong opponent, Shakuma dodges the attack and heads towards Elie, who recently recovered her memory and learnt that she is Resha Valentine, and destroys Sieg's corps with one of his magic spells, angering both Elie and Haru.
Niebel joins the Rave Warroirs and the Mages of Mildian after Shakuma is defeated by the combine powers of Elie and Haru. He, and the others, cries his heart out when he is told that Sieg is dead. Later on, they make Sieg a grave, decorated with various swords and magic weapons around it, next to Resha Valentine's grave, in honor for protecting her grave for his entire life and keeping it safe, and vow to not let another one of their nakama die during the final battle against Lucia Raregroove and his army. Niebel also listens to Haru Glory's words, as he states that he got the power of faith from Sieg. They soon leave, leaving Sieg to rest in peace knowing that he was a great Mage and friend that taught them many valuable things.
The Final Battle arc
Niebel sees Musica struggling with a Rune Wing as he walks by the area. He approaches him and explains to him that the Rune Wings only work with magic. Musica puts his hand on top of Niebel's head and thanks him for coming, which leads Musica to tell Niebel that he will fly him to where he needs to go, leaving Niebel with many doubts. Whilst driving the Rune Wing, Niebel asks Musica where are they headed, Musica tells him Punk Street, where his grandfather is located. When they are above Punk Street they are unable to see it, due to the city being covered by something they assume is fog.
They land and are shocked when they see everything frozen solid. Niebel tells Musica not to touch anything, since they are still alive. Musica then runs to his grandfather's house and Niebel fallows him. When they get there they see him frozen solid, just like the others, sitting on his couch. Musica then explains to Niebel why he was in such a hurry to see his grandfather. He tells him that, according to the book Galein gave him some time ago, the tenth for of the Ten Commandments does not exist. Niebel is lest speechless and notices that Musica begins to lose hope. He encourages him, he tells him that he is the only one who can make Haru a sword.
Niebel tries to convince Musica to head back to the ship and inform the others of their situation. Musica, however, tell him that if they go back Lucia could attack them at any given moment, since they are running out of time. He then leads Niebel to another room and forces a cabinet door open where the ingot, that was used to forge the Ten Commandments, is located. Niebel is surprise when Musica tells him that, that ingot is the last one like it in the world. Niebel then makes Musica some fire for him to use. Niebel, whilst reading the book Galein gave Musica, asks Musica if he knows the reason why his grandfather forged an incomplete sword, since his tittle as blacksmith is even know in Mildian. However, Musica tells him to read it carefully, which he does, and find that Shiba Roses did use all the forms of the Ten Commandments. He explains to him that the sword Haru has right now was made for Shiba, and not him, and now Haru needs a sword made for him.
Musica manages to make a sword. He begins to swing it around when suddenly it begins to breaks. Niebel explains that the metal is too special and needs a blacksmith of Galein's class. Thinking he is being rude, he apologizes. He turns around and sees Musica taking the pieces of the broken sword in his hand, ready to try and forge the sword again. Niebel watches as Musica tries his best to forge a sword for Haru. With many failed attempts, Niebel tells Musica, once again, that the metal is too special. Nonetheless, Musica keeps on trying. Musica tries to forge the sword one more time, but this time he uses his Silver Claiming skills. Niebel is dumbfounded when he sees the Sword Musica made for Haru, which caused an explosion that managed to unfreeze Galein. Niebel rushes to Musica's aid when Musica collapses on the ground.
Niebel turns to face the door when he hears his nakama come in. He looks at Haru, while crying, and looks back at Musica. Moments later, Musica regains consciousnesses and explains to the others that Niebel was helping him the whole time. The sword releases a beam of light that unfreezes everything within Punk Street. Niebel is present when Galein explains to the others that Haru does not need Shiba's sword any more, and when he brakes it. He then falls asleep on top of Musica, who is also sleeping, exhausted. Niebel parties alongside the other warriors. Later on, at the city of Stora Gosai, He tries to drink alcohol but before he can, Bony the Starfish, who is inside the drink, stops him, telling him that he is too young for alcohol.
Magic & Abilities
Illusion Magic: Niebel uses his Illusion Magic to take the form of another person's face, body, and even copy the person's speech, as stated by the guards that were keeping Sieg inside prison. He first use this form of magic to rescue Sieg from prison, as Master Miltz, to fool the guards into thinking that he is Miltz himself. He is even capable of perfectly imitating the person's personality. He has greatly developed his ability to make illusions, as stated by Sieg, who was also fooled by Niebel's Illusion Magic. Niebel's illusion Magic allows him to copy exactly what that person, the one he makes himself look like, wears; shirt, shoes, pants and so on. His illusion Magic do not have a time limit as Niebel is able to make himself appear to be another person for as long as he wants, and undo the Magic at any given time. He can even copy the person's weapon. When releasing the effects of this Magic, Niebel's whole body turns to smoke and begins to regain its original form.
- Mist: After slamming the target with an object, Niebel sends a giant wave of mist towards the opponent. The effects last for a certain amount of time and leave the target's area clouded by the mist. Niebel used this spell to enable him to escape from Miltz and the guards keeping Sieg locked up in prison, proving to be efficient.
- The Last Moment: Used only in battle against Jiero. This magic took caster's time in exchange of power. Niebel used a variety of powerful spells with this, like "Magic of Galaxy: Sword of Seven Stars". The magic of this was capable to fight equally against Jiero, creating the necessary advantage to Belnika and Julia finish her. However, Niebel's age accelerated till his very old. After the complete cast, he deceased. 
Mind Scanning: Niebel has shown the ability to be able to scan people's mind. When Sieg Collapsed on the floor, after his battle with Haja, Niebel scans Sieg's mind and perfectly finds the reason to his sudden energy drain. Niebel then explains that Sieg only needs to rest, which is what he exactly needed.
Sieg Hart is Niebel's role model. He looks up to him and respect him dearly. When Sieg was taken prisoner by Miltz and Haja, he takes the risk to save him with his Illusion Magic. Whilst they are walking, Niebel explains to Sieg that he is very happy that he is back and that he has changed his way of thinking. When Niebel informs Sieg that he has been running away for two years. Sieg apologizes and defends him from a thousand Mages. Later on when Haja and Sieg battle, Sieg tells Niebel to wait for him, which he does. Niebel, even though one week has already gone by, waits for him. He defends Sieg's name when Hilde and Miltz insult it and conclude that, if his opponent is Haja, he is dead. Niebel is both shocked and surprise when he realizes, once Miltz takes him and Hilde to Mildian's heart, that Sieg has been fighting Haja non-stop for one whole week. He even teams up with Miltz and Hilde, who had a change of heart, to protect and help Sieg. When Haja exploded, and takes Sieg down with him, Niebel is left speechless and begins to cry. Sieg, however, survives the explosion and saves them from Igor Kilkil. When Sieg dies, Niebel cries his heart out, filled with sorrow, and promises to not let another one of his friends die.
At first, Niebel, opposing the way the people of time think, tired talking to Miltz about it. Miltz, however, called him a traitor and order that if any Mage sees him, to kill him, causing him to run away from the Mage of Mildian for two years. When Miltz appears where Niebel is waiting for Sieg, Niebel gives him a death stare. Moments later Miltz takes Niebel down to Mildian's heart and insults Sieg, angering Niebel. Niebel grabs him by the collar, tells him to open his eyes, and yells at him as he states that his ideas only hurt the people around him. Niebel's words cause Miltz a change of heart and they team up to defend Sieg. The two soon leave their conflicts in the past and form a friendship.
Hamrio Musica and Niebel first met when they, the Mages of Mildian, offered to help Elie regain her memory. They share a brotherly relationship. Whilst Musica is struggling with a Rune Wing, Niebel sees him and explains to him that it will only work with Magic. Musica puts his hand on top of Niebel's head and the two soon leave to Punk Street. When they get there, Galein Musica is frozen solid, along with everything within Punk Street, which causes Musica to lose hope. Niebel, however, cheers him up and encourages him to make a sword himself. During the time Musica was making Haru Glory a sword, Niebel stood by him, both helping and encouraging him. Musica finally manages to forge a sword, and thanks Niebel for helping him. When the others congratulate him, he states that Niebel was the one who made it possible. When they get back on the ship, Niebel sleeps on top of Musica's chest, with Musica also sleeping under him.
- Sieghart says the magical power of Niebel and immense and the potential Niebel as magician and huge so great that the own Sieghart says that when Niebel cresser it will be more powerful than him. And it was confirmed to be true in the battle against Jiero thus showing the huge potential that Niebel has as magician.
- (To Sieg Hart) "Nothing happened to the town. You're the one who changed"
- (To Miltz) "You keep telling everyone that Sieg has to die! Then Hilde, and Flicka, and the people of the town do whatever you say! Think for a second about what it means to be in charge! Throwing away all those lives...Stop and think about what your own words mean!"
- (To Hamrio Musica) "You can forge it, Mr.Musica! You're descended from the world's greatest blacksmith, right?!"
- (To Himself) "In the End, Sieg Hart, I have decided. Even my physical body ia to be eradicated, I will never escape!"
Battles & Events
- Sieg Hart, Niebel, Miltz, & Hilde vs. Haja
- Rave Warriors & Mages of Mildian vs. Shakuma Raregroove
- Julia, Belnika & Niebel vs. Jiero
|Citizens||Sieg Hart • Niebel • Hilde • Flicka|
|Prominent Members||Haru Glory • Plue • Elie • Hamrio Musica • Griffon Kato • Tanchimo • Let Dahaka • Ruby • Julia • Belnika|
|Allies||Galein Musica • Hebi • Remi Maltese • Solasido Sharpner • Fua • Alice • Saga Pendragon • Celia • Unicorn Watanabe • Shuda • Lazenby • Evermary • Bony the Starfish • Nagisa • Yuma Ansect • Iulius • Niebel • Alpine Spaniel • Go • Rosa|
|Deceased||Shiba Roses • Gale Glory • Sieg Hart|