|Weight||18kg (39lbs upon discovery)|
|Relatives|| Ritsu Sakoshita (Older Sister)|
Keishi Sakoshita (Elder Brother)
Ichizo Sakoshita (Older Brother)
She is a pale-skinned young girl of average height with round pale rose pink eyes and dark blue teal hair worn in a hime cut. Before the attacks, she wore a white and yellow long-sleeved jacket, covering part of her green shorts. She also has a hot pink eyepatch with a candy blue heart in the middle which was inspired by her favorite TV show character.
When found by the Moon Demon Company, she was described by Guren to be "bones and some hair with eyes", weighing only eighteen kilograms.
She is presumably a somewhat mature girl for her age as she was able to find (albeit scarcely) shelter and water in order to survive for whatever time she did without her siblings. The ordeal also hints to her ability to remain calm under pressure, much like her sister.
She is shown to be extremely opinionated. As expected of any young child, Kumi has to frequently be disciplined for outbursts and rude comments.
Ritsu, however, has called Kumi her hero, as she doesn't get much slack for saying things she couldn't imagine getting away with.
- Kumi 「久実」ironically means "Long Time"
- She has aspirations of becoming a surfer
- She has a bunny named Bananabus
- She appears in a sketch with Seishirō in which their pets meet
- What she looks for in the opposite sex: Someone who looks good wearing a gakuran / Someone who will help her take care of her bunny