Marin Kitagawa is an above-average height girl with a slim figure and fair skin. Her eyes are naturally dark brown, although she is almost always seen with dark pink color contacts when she isn't cosplaying. She has long, glittery bubblegum-pink acrylic nails. She typically wears peach pink eye shadow, lip gloss and blush. She has blonde hair with an ombré transition to pinkish-red or citrus orange at the tips that reach down to her waist in the rear with side swept bangs that cover a majority of her forehead and eyebrows, reaching to her eyelashes. Two locks of hair flow over her shoulders and end around chest height. Her hairstyles include long straight hair, a single ponytail, a double ponytail, a double knot on top, a bun and a single top ponytail.

Marin typically wears multiple silver ear piercings which include a captive bead ring through each earlobe as well as two round studs in her right ear, three round studs in her left ear and a barbell in an industrial piercing through her left ear. In the manga, she can be seen with a tongue piercing, ((but this was not included in the anime.))