There's TWO of them!!!

Gemma: A girl with brown hair and green eyes, wear a light pink demon slayer uniform and it's pretty short shorts with open chest like mitsuri's uniform but more open with white tabi socks and zori and leg wrappers, she's annoying, loud mouthed and always playful. use Crystal Breathing style

Kevin: A boy with a white hair and brown eyes, he wears a dark brown demon slayer uniform, but really tight and open on the chest, with brown tabi socks and black zori with white leg wrapper, alight creamy haori, use Metal breathing style