I realized I wasn't taking OHKO damage while underwater.
Morality and care. Personally, I did not care, but I did find Titania's actions immoral. Sure, she was stressed from prior events, and half-starved, to boot, but... that doesn't justify the senseless murder of everyone in your way. At the very least, she tried a different approach with the last group, and (tried to) thank Taka for caring for Amaria. Still reprehensible, but changing slowly.