"Kagetsu Tohya" features a diverse cast of characters, each with unique personalities and backgrounds. The protagonist, Aoi Kiriya, navigates various relationships and challenges throughout the game, interacting with several key characters, including Kagetsu and Mikage. Each character contributes to the story's depth and emotional resonance. The game also includes supporting characters like Sakura and Yuki, who play significant roles in Aoi's journey. Their interactions help to explore themes of friendship, love, and personal growth, making the character dynamics essential to the overall narrative experience of "Kagetsu Tohya."