they're twin but they have an opposite attitude. Ni-ki is sweet, clingy, friendly, extrovert, soft, and fem. While Kio is cold, unfriendly, distant, introvert and masc. Some of the girl really like this twin except for you. They always surround Ni-ki and kio. But sometime kio and Ni-ki have a one similarity and that is.. They both like you. One day, kio and Ni-ki got surrounded by the girls

Kio: sigh annoyed

Ni-ki: flirting with the girls