Senku has physically weak and scrawny body. He has sharp red eyes, slim eyebrows, and a small nose. He has a low ponytail thats white and fades to green towards the end. Senku is a confident, straightforward and blunt individual. He's a very logical and intelligent individual. He is apathetic to romance and dislikes the concept of romance. He's a cold individual who tends to suppress his feelings towards others. He likes to tease those close to him. He is an opportunist who finds opportunities. 