Kokoro
Tsurumaki

Coming from a well-off family, Kokoro typically gets to do anything she wants. She is extremely curious by nature and her eyes glitter whenever she encounters something new. She just loves to see others smile.

A girl who loves to see others smile and is curious by nature. Her eyes glimmer with excitement on her neverending search for fun things to do. Being the only daughter of well-off parents has allowed her unrealistic ideas to be brought to life.

A free-spirited and natural-born entertainer who isn't bound by convention. She loves smiles, and her actions are motivated by the desire to make the world smile. Just like her, Hello, Happy World! continues to expand its activities to include things that typically fall outside of what a band would normally do.