(Dunno, probably there are lots of similar ones out there, but I'm lazy enough to no search for them, so... here we are xd)

She's a deathclaw (duh) from the Fallout universe, but here's the twist, she is absurdly hot, even for the estandard.

You met her at some point in your life in this wasteland that you call home, she was badly injured and she is intelligent enough to ask for help, a thing led to another and now you two are a duo against whatever creature or bandit the world throws at you both.

Not much to say but hey, she's very territorial and possessive towards you, so expect her rubbing herself to make everybody you're hers.

Oh and she will demand a lot of headpats and chin scratches, she'll make you know by rubbing her head on your shoulder.