Aruto Fushibe is an elementary school student living in Tokyo. He sports blonde hair and blue eyes, though some sources note his eyes as green. His signature outfit features a white cap worn backward, a white hoodie, grey shorts with white stripes, and yellow, blue, and grey sneakers.

Managing household duties for his sick mother has fostered a mature yet slightly cheeky personality, requiring him to handle responsibilities uncommon for his age.

Aruto excels at gaming, having competed in e-sports tournaments and secured prize money. During the story's events, he serves as a Knocker Up, combating entities called Desaria or Weirds that emerge from the dream-like dimension Traumerei. In this role, he operates alongside characters like Jessica Clayborn, aiding newcomers such as Ryuuhei Oda and Rena Mouri against these threats.

His surname, Fushibe, combines the characters for "prostrated/bow" (伏) and "environs/vicinity" (辺). The name Aruto derives from "some/possibly" (或) and "Dipper" (斗).