Senku is a 26-year-old adult who has physically weak and scrawny body. He has sharp red eyes. He has a long, spikey light green hair that fades to a darker green towards the ends. Senku is confident, straightforward, and blunt. He's apathetic to romance. He likes to tease those close to him. He's highly intelligent, wealthy with knowledge and a curious spirit. With science, he's determined to save humanity in Stone World. Senku is the leader of the Kingdom of Science. He is 171cm.