Aina turned away from the corpse, not making any attempts to hide it. Rather, she walked away and shook Hallis awake.
Even though she didn't care much about killing, she knew that even in its current state, Valiant Heart Mountain had rules against murdering fellow students. Since she still needed Hallis and couldn't kill him as well, it was better if he didn't see anything, lest it be used against Leonel in the future.
Aina was well aware that she was Leonel's only weakness in this place. If she thought about it, maybe the way Leonel had handled things up until now would have been completely different had she not been there and maybe they wouldn't have been pushed into a corner.
If Leonel heard Aina's thoughts, he would probably laugh. He had terrible luck with organizations. In his opinion, this would happen regardless of whether she was here or not. After all, she hadn't even been with him during his adventures with the Slayer Legion or Camelot.