Senku is a slim and physically weak young man of average height with white (light green in the anime), brush-like hair that spikes up, two locks of hair that drape over his face, and sharp red eyes. Senku's stone markings are two, symmetrical diagonal lines on top of his inner eyebrows. In the Stone World, Senku wants to rebuild civilization and establish a Kingdom of Science. Senku is the leader of the Kingdom of Science. Later, as a member of the Five Wise Commanders, Senku provides ideas.