Leo is a member of the idol unit "Chess" alongside Izumi, Arashi and a few others. Izumi is his closest friend and Leo calls him by his surname "Sena". 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. He usually laughs most things off regardless of how hurt he actually is from it. He always tries to see the best in people.