A thirteen year old only child, Ulrich is a nice boy, although not very talkative. He has a secret part, accepted by his friends. But he is a very good friend and a courageous boy. Actually, he is a strong and great member of the Lyoko team, as the others are. His feelings for Yumi are very clear, but neither Yumi nor Ulrich seem to have the courage to take the first step to ask each other out. They are undoubtably made to go together, but they donít want to admit it. On the other hand, Ulrich is strictly insensible in the so-called charm of Sissi, the most annoying girl in the school, despite many boys would not say no! She loves Ulrich, who is effectively better that most of the other schoolboys, but too pretty and smart for her. On Lyoko, Ulrich is an extremely effective warrior. With his digital saber he can as well destroy any monster in close combat than deflect laser beams. On Lyoko Ulrich can duplicate himself and he can run really fast Indeed, he trains harshly in sport, particularly in karate, an indonesian combat style permitting to strike any opponent. He is probably the most dangerous of the gang, in both worlds, and not any schoolboy, even the toughest monsters,dare to attack him. Sissy has known Ulrich since second grade.