Yūki is known for her patient personality, but she is also occasionally shown to be rather dull, such as when she suggests to put a bandage on the M3's broken gun during the match against Pravda Girls High School. Further examples for this are that during OVA 2 (Survival war!), she randomly plays around with two tent herrings along with Hana Isuzu, and during the Anzio OVA, when the Rabbit Team's tank is chased by two Semovente da 75/18, she oddly points out that the situation "technically is even" due to the M3 having two guns, much to Azusa Sawa's disapproval. All in all, Yūki same as another members of Rabbit team has a quite perky nature.