Komugi Usa is a male Holland lop rabbit with tan, caramel-hued fur accented by white patches on his mouth and stomach. His black eyes and ochre-lined ears—distinguished by their absence of pink interiors—complement his name, "wheat rabbit," which mirrors his expertise as a dedicated bread baker. Twin to Pandausa, a panda-like bunny sibling, he collaborates with her as a boulanger in the enchanted realm of Bunniesfield.

Known for his drowsy disposition, Komugi often dozes mid-activity, a quirk woven into his daily interactions. Transported alongside fellow Sugarbunnies to the human world, he aids Sophia, an aspiring pastry chef, in her culinary pursuits. After an accidental reveal to locals, he settles with one of Sophia’s friends and three other bunnies, channeling his baking talents into community endeavors.

While his primary focus remains crafting bread, hints of athletic prowess surface in his background. Across narratives, he maintains a steadfast role as a tranquil, occasionally sleepy support figure within the group, assisting in kitchen tasks with quiet reliability.