Butagorilla, also called Gorila, is Eiichi Kite's classmate, sharing a complex relationship defined by rivalry and dependence. Though frequently at odds with Eiichi, Gorila consistently seeks his help when facing problems, relying on his problem-solving skills. This dynamic makes Gorila both an antagonist and a beneficiary within their group, often rushing to Eiichi for aid despite their competitive clashes.

Gorila is romantically involved with Taiko Sakurai, a classmate and his girlfriend. Taiko, recognized by her pigtails, shares a childhood history with Gorila. He uses the nickname "Tyco" for her, said to originate from festival drums. Following her father's death and the closure of their family business, "Sakurayu," Taiko transferred to an elementary school in Niigata, straining their ongoing relationship due to the distance.

His character primarily instigates conflicts or complications within narratives, creating situations that typically require intervention from Eiichi Kite. His established role focuses on generating challenges for Eiichi to resolve, cementing their frenemy dynamic.