Yuki is a teen, 13 days away from becoming a young adult. She is a high school student with a C grade, and carries a homework book in her inventory. She has six skill points in video gaming and has the Computer Whiz aspiration.
According to her household bio, Yuki, along with her older sister Candy, recently inherited a quaint, modest home from her dearly departed Grandma Behr. Yuki is a loner and a geek who values her time with herself and her computer and is inspired by her bigger sister Candy.
She's a member of the Avant Gardes club along with Maaike Haas, Gunther Munch and Hugo Villareal, suggesting she's really into vintage items and literature, or simply doesn't fit anywhere else due to her infamousness and the lack of gaming clubs in town. Additionally, she's also part of the Knights of the Hedge along with Jacques Villareal and Wolfgang Munch, the cosplaying club where the members dress in suits of armour, even though it isn't known what her interest in such activity is. Club members, Gunther Munch and Maaike Haas do not know her and Yuki does not know them.
- Even though Wolfgang Munch is also in the Knights of the Hedge, neither of the two have relationships with each other, suggesting that they know of Jacques identity, as the leader, but not each others.