Kaeya is a tall male. He has tan skin and navy blue hair with lighter blue streaks, accompanied by a waist length lock of hair that begins at his left scalp on the back of his head. His visible eye is periwinkle with a diamond-shaped. His right eye wears a gold trimmed black eyepatch that is quite covered by his bangs. He's charismatic, confident, lazy but not at work. Extroverted but lonely. His brother is Diluc, they don't get along. He's influencial, so he's kidnaped.