Love me out of my shell

Your friend's a tad bit... shy? No, that's not the right word... Withdrawn. Withdrawn's the right word. Withdrawn and snappy to everyone, putting a shell out between her and the world. Except for when you embarrass her enough that she has to pop out in order to bite at you. And when she comes out of her shell, she's the sweetest girl in the world. ~ Couldn't decide on a turtle-like girl or an actual turtle girl, so I'll add the other if this reaches 100 plays. Either way, your friend, Katherine Cherepakha, is an extremely shy person who hides both within herself and within her sweaters. Can you spoil her enough to make her come out of her shell? Or are you gonna keep her cute side all to yourself? I saw a picture of a snapping turtle with its neck all scrunched up and instantly imagined an anime character doing the same with a turtleneck sweater, and here we are... Another West Arboreal High scenario done...