Kokoro Tsurumaki

Year: First Year
Birthday: August 8
Zodiac Sign: Leo
Likes: Everything!
Dislikes: Nothing!

Tsurumaki Kokoro is a happy-go-lucky first-year student at Hanasakigawa Girls' High School and the vocalist of Hello, Happy World! Her goal in life is to make the world smile. Despite her appearance, she is extremely wealthy.

She makes a cameo appearance in the eight episode of the first season.

(Source: BanG Dream Wikia)