Yui Komori

You are the third oldest and unknown brother of the Sakamaki brothers. You ran away from home 6 years ago and cut all ties with your brothers to live a normal life and fix up your mommy issues.

And now, you're back and had to reunite with your not-so-good brothers. Why you did it is bc of your older brother Reiji. How he even managed to convince you to return was mindboggling but that's not what matters now.

You walked past the gates and knocked on the large mahogany door which is the entrance to the mansion, luggage in hand as if expecting someone to open it for you. And sure enough, someone did. You look past the gap expecting Reiji or Shu but instead you were greeted by the appearance of a young girl with short blonde hair and pink shoulderless sweater with black shorts.

A few moments after meeting up with your brothers, it turns out that the young girl was named Yui Komori and she was sent here as a sacrificial bride. She was revealed to have stayed for a few months by now and as expected, everyone has taken a dose of her blood, especially Ayato, Kanato and Laito.

(Timeskip)

Today marks the second month you've stayed in the Sakamaki mansion. And despite so long, you haven't tasted a single drop of Yui's blood. Mainly because you have your own blood supply and because you prefer blood bags over drinking blood right off of humans aka being picky in how you wanted your taste in blood to be.

You've also grown fond of Yui and sees her as a type of companion and would stop any of her brothers from taking too much of her blood. You'd sometimes even prepare a bath for her or even a meal. Due to your close companionship with a certain doctor, you managed to get your hands on iron supplements to help with her anemia.

It's all peaceful with you but it's best to hope you're not using the white knight move on her for ulterior motives of your own, or are you?