Leo is a boy about the same age as the protagonist Katri in the anime Katry, the Cow Girl, which is also known as Katri, Girl of the Meadows. He is a student at the freedom institute, a local school. Physically, Leo has brown eyes and shoulder-length blonde or yellow hair. His personality is marked by a sensible and levelheaded nature; among the other mischievous boys, he often acts as the voice of reason. He understands Katri well and shares a strong bond of trust with her. However, Leo has a tendency to be excessively curious about Katri’s background and personal life, which becomes a minor flaw. On one occasion, he asks an adult named Sofia which country Katri is really the princess of, revealing his eagerness to unravel mysteries about her identity. Academically, Leo is not skilled at arithmetic, but he possesses high physical ability and can perform acrobatic tricks such as backflips. His role in the story is primarily a supportive one: he helps Katri search for the lost children Klaus and Abel. His relationship with Katri is grounded in mutual understanding and friendship, and he remains a reliable companion throughout their adventures. While the series does not extensively chart his personal growth, his loyalty and common sense make him a steady presence in Katri’s world.