KMST 1.2.413 - More Skill Changes (2)

 Spoiler

So Su's in the tank because she was heavily injured by Phantom long ago. She and Orca had killed Aria in a battle @ Ereve long ago. Su's...spirit...floats around the maple world in her stead, and Phantom meets this spirit through The Rememberer, goes to Edelstein to find her in the tank, and then, I think, kills her. It's hard to tell from just the quest start/ends.

Edit: Also, I can only seem to find like 1 quest dealing with Hilla. If you guys want to look, go through the quests and ctrl+f "힐라" if you want.

I found 1 from butler guy and another from Francis.