Yui's little brother (Diabolik Lovers)

How will the vampires (Plus the dead: Beatrix,Christa,Cordelia,Karlheinz,and Richter) and Wolf founders brothers:(Carla and Shin) Along with Kino react to Yui having a brother? Will he get along with everybody or will he put them though the ringer?

Will be a mix of canon and not canon
I own this book and my oc
artwork goes to their rightful owners