First, who are Risa Murakami and Dog 1 Magichandsavi? Risa Murakami – I think she's a female athlete, maybe MMA or wrestling? Wait, Dog 1 Magichandsavi isn't a person, right? Maybe it's a nickname or a character? Or is "Dog 1" referring to a canine competitor? That seems odd, but maybe it's a promotional gimmick. Alternatively, maybe Dog 1 is a human competitor with some sort of character theme.