A Mythic of the Kyo tribe, part of the Water Sect of the East Alliance, Kong Soohyeon has the ability to control water. She is the only daughter of Kong Maeok, the current Arbiter of the Alliance, and is currently engaged to marry Lord Juan Yun of the Qilin tribe. Although she occupies a high position, she is polite to all.

A highly skilled dancer, she surpasses all others in the East Alliance. As a child she witnessed her mother get attacked by the Insect Tribe, and as a result fears them to this day. She seems to have an opinion on all matters, sometimes to the chagrin of others. Although she often argues with Yonghyeon, her childhood friend, they actually have a very close relationship.