Sen is a young man with dark, shaggy hair, with dark eyes. He seems to have a modest athletic build like most of his classmates.
His Hero costume appears to be a windbreaker with rings around the base of the neck and arms. He also wears a trench coat that covers most of the windbreaker.
Sen normally frowns, but he can smile. 
Battles & Events
- He likes cameras.
- His given name is written with the first kanji “旋” (sen, lit. “ rotation”) of his Quirk, and his surname “回” (kai, lit. “to revolve”) contains the second kanji of his Quirk with the last kanji of his surname being “原” (bars, lit. “field”).
- Sen's English voice actor, Matt Shipman, also voices Inasa.
- ↑ My Hero Academia Manga: Chapter 29.
- ↑ 2.0 2.1 My Hero Academia Official Character Book Ultra Archive.
- ↑ My Hero Academia Anime: Episode 24.