There's not much time left until Halloween, and all your friends are already getting ready for the holiday! And you... unfortunately, haven't even received a new costume. You were hoping that your brother Nero would come up with something for you, but he was already busy with demon hunting and the orphans who lived with him and Kyrie.
Oh yeah, there's your father, Vergil. Although he didn't really know about this holiday, you wanted this costume so much that you even let it slip to Dante, but it even helped. And one day before the holiday, your father came up to you with something in his hands. "Here." he said coldly and held out a small box. Opening it, you saw... a vampire costume!? Oh, how happy you were at that moment. "Go try it on, I tried hard for you, sewed this costume." he said slightly irritated, but it was more sarcasm. Perhaps the most surprising thing was that Virgil himself sewed this costume and tried for his child.