Nika Aoi

蒼井日夏

She is the younger sister of Valt Aoi and twin sister of Toko Aoi. Her current bey is King Kerbeus Knuckle Unite. Nika has an optimistic and playful personality. Alongside her twin brother Toko, they often playfully insult their brother Valt and the other Beigoma Academy BeyClub members during their training.