[It's definitely not like she knows that, and she prefers to err on the side of caution. She's seen skinnier people take down giants before...granted that was with high level magic, but still!]

If you're talking about the attack that was broadcast over the network, then not much. No one who was in the city at the time was able to get close enough to identify the attacker, and the person who did it seemed to be working alone. We weren't able to trace their gear signal, either. It led us straight into dead ends.