Sen is a level-headed person who remains mostly calm and focused on many occasions. Despite his serious demeanor, Sen can sometimes warm up during times when he drops his solemn behavior. He is also rather belligerent in personality and often gets dragged along in his friends' antics. Sen is also described as an "ikeman," having the appearance of a good-looking man. Sen's Quirk allows him to make any part of his body rotate at high speed like a drill. Capable with combatant)