Unfini

One of the dormant maintenance golems previously employed by the Angels during their experiments on Regulus island, the ruins she sleeps in are uncovered when a meteorite falls on the island. When Gil's party accidentally discover the entrance to the ruins and venture inside, she attacks them and is only pacified when Gil strikes her on the head which resets her memory and leads to her acknowledging him as her new Master.

Despite Mirabel's best efforts, the technology employed to create Unfini is beyond their complete understanding. What they do learn is Unfini has no need for sleep nor nourishment and can function by drawing ambient mana and converting it to energy in her internal systems. Perfect for a being created solely to maintain the Angels' multitude of experimental test subjects.

As she travels with Gil's party, her amnesia is filled through experiences of the human world which conflicts with her ordered and logical thinking. She learns to prize these experiences and starts to comprehend the meaning of "desire".

She and all of her peers are connected to a central network which periodically compels the golems to return to a maintenance station on the island for memory sharing, reset and repairs. Unfini eventually gains enough self-awareness to reject the network call permanently, even going so far as to assist Gil's party in defeating one of her peers when it tries to forcibly bring her for reset.