Balance is an original character created specifically for the Undead Unluck Winter Hen anime special, as he did not appear in the original manga. He is a being known as a UMA, an embodiment of a universal concept, and his existence is tied to maintaining the equilibrium of the world. Created by original manga author Yoshifumi Tozuka for this anime adaptation, Balance is visually distinguished by a motif that incorporates scales, a traditional symbol of justice and equilibrium.

As a UMA governing balance, his fundamental motivation is to preserve the world's stability. This mission directly places him in opposition to the protagonists, Andy and Fuuko, whom he attacks in order to reclaim Apocalypse, a key artifact within the story's universe. His role in the narrative is that of an antagonist and a significant obstacle, an original addition to the Winter Hen arc that expands the lore and conflict beyond the events of the manga.

His personality, as suggested by his voice actor, is expected to be chaotic and rambunctious, with the character bouncing across the screen in a wild manner. This implies a forceful and unpredictable nature, fitting for a being of raw, conceptual power. Since Balance was created for the anime and does not have a counterpart in the original manga, there is no documented character development or pre-existing key relationships within the story's canon. His primary relationship is as an adversary to the main cast, serving as the physical embodiment of a systemic force that tries to correct an imbalance caused by the protagonists' actions. His notable abilities are directly tied to his nature as a UMA of balance, although the full scope of his powers has not been detailed beyond his role as a powerful enforcer of the world's rules.