Talk:Lilith/@comment-97.100.203.194-20151128230615/@comment-69.166.47.138-20151130135825

That's probably just a nickname that Giev gave her. If I were to guess, she's something along the lines of a trion soldier that has the capability to think for herself, not unlike a human. I think the closest comparison in terms of personality would probably be Irisviel from Fate/Zero, as both are artificial creations that are naturally curious about everything around them.

As for why she's running away with Xeno, I'm thinking it's possible that the people at Ergatis see Lilith's inquisitive nature as a liability and want to reprogram it in order to make her more efficient as a killing machine. Xeno, not willing to let this happen, ran away with Lilith before said reprogramming could be done to her. As she probably doesn't have her own natural source of trion, she absorbs it from others (would explain the whole biting Xeno's neck thing).

This is all speculation, but given what we have, I think this hypothesis has some merit to it.