Eili has a colour pattern consisting of charcoal grey, turquoise blue (rather muted when depicted canonically), and striping of dull gold. Her head tufts consist mainly of small feathers ranging in length while her hair plumage is made up of ten thin quill feathers. Her tail is roughly spear shaped.
Her default expression is Cheery with bright eyes and a semi-permanent puppydog smile. Her nose is pointed and the bridge of her nose is flat due to bone deformity of her skull.
Her regular outfit consists of a white undercoat and a lustrous cobalt blue belted cloak along with a pair of goggles on her forehead.

Eili's behavior is rather high energy, she gets exited easily and has an infectious happiness to her. She enjoys interacting with people and finds a sense of joy out of introducing herself to strangers who seem comfortable with her presence. Despite this she is also equally as comfortable with simply sitting in silence when with those she cares deeply for.