Kaeya has a tanned complexion and navy-blue hair with streaks of lighter blue, accompanied by a waist-length lock of hair that begins at the base of his scalp on the back of his head at the left. His visible eye is periwinkle with a diamond-shaped pupil. Over his right eye, he wears a gold-trimmed black eyepatch that is mostly covered by his bangs. Kaeya has not been seen without his eyepatch, but his right eye, which is functional. Why he wears it is a mystery.