Diabolik Lovers Subaru's sister

Ophelia is Subaru sister and will she help Yui or be mean to her and will she act like her brother and will Yui ask Ophelia about her past and will Ophelia tell Yui about her past or will she still be mean to Yui and not help her out and drink her blood just like her brother or will save Yui from Cordelia and not let Cordelia take Yui's body or her heart and soul and will Ophelia help Yui during the red moon i don't own Servamp or Daibolik Lovers they belong to their rightful owners and fun reading my story.