I love seeing casual skins for serious looking characters. It's like seeing an all new side to them that's also kinda relatable. I'm really tempted to buy this one even though I'm not close to getting her at all.
For reals actually, this is the standard skin for Bunker Hill BEFORE you get her in 13-4, after which she puts on the standard skin instead.
Edit: Was probably too obscure here, but the point was that Bunker Hill farming takes forever, so while waiting for you to get her, she is just NEETing in her room like this and just dons her standard skin when you finally got her.