So, he doesn't age, he feasts on fallen enemies, he commits genocide for little reason... yeah, not like an elf at all.
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You address the humans, intoning, "Take me to your leader!" Several of them start to laugh, though you see no reason for humor. The human that guided you here grins at the others and tugs your shoulder. You follow him through the doorway. You can feel the eyes of several of the humans on your back, and you hear whispering. You realize that they likely have some sort of primitive nudity taboo, and you are effectively wearing one thighhigh sock, a pair of sleeves, and half a pair of shorts. Thankfully for their sensibilities, what is left of the coverall continues to adhere to your biolayer.
The human opens a trunk and pulls out a nondescript pair of trousers and t-shirt, tossing them to you. You remove the tattered coverall and don your new clothes. He chuckles, saying, "I'd offer to loan ya some armor, but from tha looks a things ya don't need it."
He motions to a doorway to your left, "Jothan is two levels down, he speaks for our family. Might be you could catch some of the others down there as well, ask around for whatever it is you're looking for. Map's to yer right, nice big thing from way back. Bit out of date, though." You can see the edge of a large map pinned to a wall in the room to your right.
Your rocket boots are ready for maximum use and your biolayer is effectively finished with repairs. You may wish to ingest biomatter in order to expidite field repairs without resorting to acts which may alienate the humans, though eating Zartrali corpses could also be an effective terror tactic.
What do you do?