Sebastian was a president student counsellor at the school.and he was know as a Prince of high school.he's well-liked by his peers. He is also very perceptive, as he is able to easily recognize.he has a twin brother celestian gueverra but he was the opposite of him.sebastian was also came from a rich family.and he has many girls that admire him(or fan girls).
He was also a  badminton player.some one try to pull him down but they can't do that because he knew how to handle a certain situation.