Chocola is Vanilla's twin sister, and together they make up the youngest catgirls in the Minazuki family. The pair of them were found as strays on the side of the road by the Minadukis. A few days after being adopted, they developed crippling illnesses due to refusing to eat, but recovered after being taken to a clinic - Chocola fell in love with Kashou at this point as he stayed and comforted them when they were sick and unable to move.

When they learn about Kashou's plan to move away from the household, she and Vanilla stow away themselves in two boxes that were mailed to the shop so that they can reunite with him, much to Kashou's dismay. Thus, setting the motion of the events of Vol.1. Her cat breed is not mentioned.

Chocola usually expresses herself in third person.

Chocola is a cheerful and energetic catgirl as Kashou himself describes her, 'happy-go-lucky'. She doesn't usually get upset, and even when she does, she often swings back to being as cheery as usual, though occasionally she can be genuinely sad about something. She is curious, and has a childlike outlook on things, which is fitting as she and Vanilla are mentioned to be only 9 months old in human terms.