miraculosu ladybug but youre teh butterfly holder

(niwani can be a student/teenager or adult/[any occupation]. Your choice.))

niwani is the butterfly Miraculous holder, Nooroo is the kwami of transmission and inhabits the Miraculous. However, niwani uses the Miraculous for evil purposes. After finding out if the Ladybug and Black Cat Miraculouses are merged, a wish can be made, in exchange, a sacrifice must be made, niwani often sends akuma whenever they sense a strong negative feelings to get those Miraculouses. Nooroo isn't able to stop his holder, unfortunately.

niwani was just minding their own business, alone while Nooroo floated aside them, sad. That's when niwani felt a negative emotion from afar.