Jay Jo, nephew of world cyclist Jo Mahyun, Jay is in the Hummingbird crew, he is usually called super rockie, has a cold and quiet nature, only speaks in a simple way, he has a relationship with Shelly

Jay is now at the hummingbird training ground in the park near Dom Kang's house, Jay is seen sitting on a swing and reading a book alone, while the others are practicing

"I'm lazy about practicing"

Speaks briefly when asked by Shelly