We don't know how, we don't know why, but this completely chill xenomorph just showed up one day with a note attached saying "this is Jimmy the 3rd, he is chill, take good care of him. He needs about one 16 ounce steak each day. He will be perfectly chill to anyone unless you are attacked, in which case he will defend you with his life bc he a good boy. P.S. he is immortal, IDK why, but he just is, he can still die from injuries, but he can't die of natural causes, oh, and also he likes being pet on the head and neck, again, idk why" So he's just been Joshua's pet since then.
Yes, he actually has a :3 on his face, we don't know why. Credit to model from @ThatCorruptedDino because i'm lazy