Ki-D is a young female "helper"
Unlike her kind, she does not own a "tool", yet
Instead, she carries a satchel, which she places items in that she tends to collect while traveling.
She also enjoys trying to come up with ideas to create something using said items.
A fun thing about her name is how it is a reference to her species' early concept idea, and age-wise
There is also a size comparison image showing both her and an adult of the species.

Ki = "Key", and when combined with "D", the name sounds like "kitty" (as in a small cat, which refers to the species' cat-like appearance)
Removing the - from the name also gives you "Kid" (as she is a young character, around a pre-teen)