Twin brother of the main antagonist and former heir to the Knight Lord title. He rejects knighthood to become a Makai Priest and partners with Kouga. He secretly operates as the cursed attacker, fights alongside Kouga to unmask himself, and later explains his troubled past to Garo.
Leo is Kouga's mentor in the ways of the Makai Knights
Leo and Rei work together as Makai Knights
Kaoru respects Leo as a Makai Knight leader
Rei respects Leo as a fellow Makai Knight
Leo watches over Kaoru as part of his duties
Explore the full interactive character relationship map of GARO: Makai Senki