Kaneko is the one with dark brown hair and blue eyes, he weilds a red katana and can use sun breathing. Kai is the one with white hair and blue eyes, he weilds 2 sickles with golden outlines and can use water breathing (yes this is based off demon slayer) You can choose your appearance, gender, race, breathing style, weapon also you can be a demon or human your choice (Kai has sickles like Tengen)