Eri

Eri is, by definition, a fierce huntress whom prefers to walk alone.

... Mostly alone. Buck likes to walk with her, and she likes to walk with Buck.

The only dragons who could even insinuate that they and Eri have more of a 'we share a lair and she brings meat home but other than that i barely know she exists' relationship would be Belflick and Aurelius.

Belflick because she raised Eri along with her batch of eggs that contained Vanilla and her siblings, and Aurelius because he is the only dragon who Eri isn't opposed to curling up with in the same nest during the colder months. Or sharing food with. Eri likes Liu.

Eri is a dragon who is liked by the lair for her consistency- she brings food in, she talks with Liu, she checks in on the hatchlings, and then goes about her business. Vanilla finds her adopted sister strange, but in a good way, and Eri shares a kinship with Vanilla- with all of Bel's children.