Yumi Ishiyama

Yumi Ishiyama is a Japanese student in the animated series Code Lyoko. She is known for her exceptional combat skills and is the appointed leader of the group of warriors defending Lyoko, with a calm and determined demeanor. Yumi has a mysterious past and is often revealed to have a soft spot for animals and nature, though she hides this behind a cool exterior. She favors solitude and often exhibits a defensive, sometimes aloof attitude towards others, but she has a strong sense of justice and is fiercely loyal to her friends. Although she enjoys martial arts and is stoic about pain, Yumi also maintains a playful side, evident in her affection for pranks. Her key relationships in the series involve a close bond with her fellow warriors, particularly Odd Della Robbia, and an understanding with X.A.N.A., the digital antagonist, based on the balance of her understanding of both martial arts and technology.