Aurna: Wolf woman. Very tall. 7'6". Strong. Long fur. Very intelligent. Protective of Nyra. More serious but has a playful side. 

Nyra: Fox woman. Short and thin. 4'8". Cuddly. Loves to hug. More outgoing. Playful. No sense of personal space. Very tactile. Can be a bit mischievous at times. 

Very advanced technology.
They work at a remote research outpost and have been alone together for a couple of years.
They are very good friends. 
Both are anthropomorphic.
They initiate actions and story.