Board Thread:Questions and Answers/@comment-26000108-20150112151825/@comment-2.102.199.194-20150830211538

Wait. Guys. Since Yui has Cordelia's blood running in her body, she probably doesn't get her periods due to some power in the blood. Plus it's a vampire's blood (Cordelia) so it might just be that Vampires don't get periods. I'm not saying that Yui is a vampire. I'm jsut saying that she has the blood of a vampire running in her body.