Lenny is a normal person that lives in Scrapheap. He looks over the brahmin that are used to fuel the generator. Thinking they are his "friends", he tends to sleep in their pen at night so that they do not get scared, causing him to smell like brahmin dung. According to himself, he does not like the Fools because they are 'mean' to him.
If Max Stone asks about buying one of his brahmin, he states that he could not possibly sell his 'friends' and that he is not a slaver. If Stone upsets him, he will stop talking to him.
If Stone approaches him while armed or wearing armor, he will become upset no matter what after one talks about buying the brahmin. If Max states they were only testing him, he will say they're nice in case they were unarmed. If they say the brahmin are just animals, he will state that no-one understands him if the player character passes a Speech check.
If Max Stone reveals that Lex is actually slaughtering the brahmin for food, he will become hostile however will run away instead of attacking. Ending the combat allows Stone to talk with him again.