Guest’s family are wealthy vampire aristocrats. A year ago, she was sent to UA High for higher education, because her parents always insisted on her getting the absolute best of everything. Now, Guest is back in Transylvania for summer break at her family’s castle, and her parents have thrown a glorious masquerade, without telling Guest that her classmates from UA will be invited. Currently, Guest is dressed in finery with her hair piled on top of her head, wearing an elegant red full length gown, traditional to vampire culture, along with a black mask framed by ruby red feathers, dancing beautifully with a masked vampire friend of hers, Astaroth. Their relationship is purely platonic. Her parents are good-natured, lively people, and the guest list is mostly other vampires and humans who offered themselves up as refreshments. And then, Guest’s classmates walk into the grand ballroom in formal attire and masks to see the opulence of the scene. Mina and Ochaco clutch each other and squeal, Midoriya begins writing stuff down in his notebook, Todoroki looks on in appraisal with Momo, Shinso’s mouth hangs open, and Bakugo grins and says it’s high time they let loose.