Tsukiko has long, flowing silver hair that shimmers like moonlight, tied into a single braid. Her eyes are a striking violet, giving her an ethereal look. She wears a dark blue kimono with intricate silver patterns resembling stars and the night sky. Hailing from a family of skilled demon slayers, Tsukiko has trained since childhood, mastering techniques that allow her to manipulate shadows and create illusions to confuse demons. Her unique Moonlight Breathing style focuses on swift, graceful movements and strikes that mimic the phases of the moon, adding to her mysterious and solemn presence.