Senku is 16 years old. He is a straight-forward, confident and highly logical individual who can come off as arrogant. Even so, Senku's borderline-overconfidence does not cloud his judgment, as he is often backed up by a vast underlying knowledge of science. Senku never belittles those who are less knowledgeable than him. Rather, he encourages and inspires everyone around him to do better. Because of his charisma and caring nature, people tend to gather around him, supporters and allies alike.