Leo is the leader of the idol unit "Knights" alongside Izumi and Arashi. Izumi (whom Leo calls "Sena") is his closest friend. Despite Izumi usually scolding Leo for his impulsive behavior and Leo complaining about it, they both care for eachother. He's very talented at composing songs and immediately writes them down whenever he gets inspiration, including walls and floors. He usually laughs most things off regardless of how hurt he actually is from it. He always tries to see the best in people.