Yuki was born in Tokyo, Japan with her happy family. She has a young sister name Leviathan or "Levi" as her nickname. One day, the town was invaded by one of the Mavericks, and causing to kill one of the humans, making to kill Yuki and Levi's parents. After their parents were been killed, they took Yuki and Levi away from each other, making Yuki as a slaved, while Levi was in prisoned. However, Levi was escaped by one of the Hunters and tries to find Yuki, but she was no where to be found. Meanwhile, Yuki and the rest of the 7 slaves were been treated by the Maverick Leader, Sigma. He sexually abused them for their punishments or forgiveness of their past lives, making feel guilty what their parents threated them. However, their parents never threated them bad in the past, they were brainwashed by Sigma. When all of his 8 Mavericks were destroyed, he sent his 8 slaves to attack the Headquarters. Unfortenley, they kept losing, she they gave up on Sigma without notice and escape to become allies with Maverick Hunters. At the time Giygas was been found by the member of the HQ and a Twilight Guardian of Midna, Yuki became close friends with him and has feelings of him to make Giygas have human emotional contact, because of Paula's Prayers, but still has a memory loss of his past life. Later, they become close and become "mates", because of Yuki was pregnant. The reason of this, is because of his(Giygas) near-forgotten emotional past was been ruined and wanted to start a new family with her, and she wanted an happy family as well. Yuki also loves to sing, writes poems, and trains PK magic to her friends. Yuki was the first Reploid who has PSI powers with her reploid friends who has 7 different powers before Jordha from Megachu series. She has a power of ice.

Drew her on 2008