Obishima has short dark hair shaped in a bowlcut manner, in conjunction with a tan complexion. She is often mistaken for a boy.
Obishima encompasses a docile, submissive personality, as she allows Yuba to order her. She has a large amount of respect for Yūma. She is also very tolerant of people mistaking her for a male.
- "Yukari" can have multiple meanings depending on the kanji, but in this case, it has none due to being written in katakana. "Obishima" (帯島?) is written with the kanji for "obi" (帯?) and "island" (島?).
- Her Japanese voice actress, Ryō Hirohashi, also voices Sayoko Shiki.
- According to Volume 21, she likes;
- Black sesame dango