Although the Squad believes that everything is in vain, their actions seem to contradict that, unlike Misaki who even attempted to commit suicide multiple times due to how hopeless she is. She shows to be careless about everything that will or might happen unless it's important enough for her to make a decision about, i.e. missions.

Her wrist and neck are layered thickly with bandages, as if attempting to hide something...

She has claustrophia and is allergic to pollen