It does sound odd, saying 'not human'. Of course, Eponine had realised - and she wondered what exactly he was. But was it her place to ask? Did she want to hear the answer? Would she even understand?
Sometimes, it was best to assume things and not think too much about them.

"You know, I like sleeping rough. Just lying in a ditch, looking up at the stars. And nobody knowing where you are. I used to wander for hours and hours, until I was so tired I could go no further, and then I would sleep in a ditch or under a bridge or so. It was cold... but cold is better than a beating sometimes."

She laughs again, and mutters 'What the hell?". None of it is said for sympathy. It is just how life is. She knows that - and Warsman should know that. She doesn't want sympathy. Sympathy makes her think how bad life was - is and she would rather not dwell on it.

"I don't want your money, M'sieur. It is only shoes; it is not like I am starving. And I am in enough debt here; I do not want to owe more people money or favours or promises."

She sighs too at the mention of Hattie.

"She is not so bad...sometimes. My Lady is just... I wish she thought of me as an equal and not as child or a fool and a servant."