One of the two characters from Goblin Burrow Illborne that has infinite sanity. She is a former classmate and a rival of Irari from the first game. But while Irari is a model novice adventurer, Claire is an opportunist. One of the reasons she has infinite sanity (other than being a starter character) is that she is fine with anything, as long as they don't kill her.
The only reason I know her outfit has thighhighs and boots and that she's wearing shorts and not pants is because it's seen in her tiny combat sprite. But it is too small to be used for training.
Claire: Claire, blonde hair, low ponytail, side ponytail, long hair, ahoge, purple eyes, small breasts
Extra: adventurer, shorts, leather vest, white shirt, midriff, sword, sheath, long boots, black thighhighs