Inuyama Akari

Japanese name:	犬山 あかり
Nickname:	Chibi Inuko, Mini Inuko

Inuyama Akari is the younger sister of Aoi Inuyama. Her age is unknown, but based on her appearance in the Yuru CampΔ Movie, she is probably in early middle school during most of the manga and anime.
Akari has a childlike innocent personality and looks exactly like her older sister, Aoi. Chiaki Ogaki calls her the “Chibiinuko” ("Little Inuko"), and since the appearance of the other person is very similar, the two are collectively called “Horabuki Sisters”.