Leo

Leo (レオ) is one of the secondary characters in Level 1 Demon Lord and One Room Hero manga and anime series. Leo is a warrior who overthrew the Demon Lord together with Max, Fred and Yulia. Several years ago, he defected from the Kingdom of Bescar and founded the Gamma Republic in the northern part of the kingdom. While trusted by his subordinates and the people, the Kingdom sees him as a terrorist conducting an illegal occupation. He is a martial fighter with a heightened sense of smell.

Appearance
In his youth, Leo was a young adventurer with dark skin and a well-defined muscular build. When he was still a member of Max's party, Leo used to wear a full-body armor that strongly resembled that of a knight.

Ten years after defeating the Demon Lord, Leo has now been shown to no longer use or have any armor, wearing only a loincloth. He has also honed his physical shape over the years while letting his hair grow out.

History
Ten years before the rebirth of the Demon Lord, Leo was an adventurer, and a member of Max's party. The two formed a strong bond from when they first met in a fighting tournament.

Seven years after the defeat of the Demon Lord, Leo decides to leave the Bescar Kingdom with his old friends Anego, Joe and Will, and established the Gamma Republic in the northern part of the kingdom, becoming its self-styled leader. He and his allies are able to keep this new republic safe from the Kingdom's forces during its formation.

During a border clash with Fred's agents, Leo senses a strong demonic presence and personally arrives to drive off the Kingdom's forces. Realizing the presence remains, he charges into the nearby forest and discovers Max and Maou in disguise observing the clash. He quickly recognizes Maou as a demon but is unaware of their true identity as the reincarnated Demon Lord. Max defends Maou from Leo's attacks long enough for her to teleport the two of them away to safety.