Roshi, an elderly homeless man, resides near the school route. His disheveled appearance features a hat, facial hair, closed eyes, and missing teeth. Embracing a hermit-like existence, he occupies secluded locations like parks or alleyways, dispensing unconventional advice to passersby.

His interactions unfold through brief encounters with main characters, where he delivers cryptic or eccentric guidance that shapes their decisions. These exchanges fuel comedic scenarios within the narrative. Roshi appears in episodes 6 (debut), 9, and 12, maintaining a consistent minor recurring presence.

No substantial character development or background expansion occurs. His role persists as a source of sporadic, humorous commentary through advisory moments, devoid of deeper exploration into his origins or personal evolution.