Azumi Kagamihara

Azumi is from the Blue World. She was on the verge of death due to an unknown disease but her life was extended with the help of the Blue World's technology. In exchange, she has to fight together with others against the other worlds. She is a shy character but she has a very strong will to live, especially since she already came so close to death before.

(Source: ZXTCG Wikia)