One

You are (Y/Name) Suoh. The girl screaming next to you is your twin sister, Taeko. No one else is part of your world except your brother, Tamaki. Would it be possible for you to find love? No. It won't. You wouldn't let it happen. You wouldn't be able to live with yourself if you found Taeko was harbouring feelings for someone either.
[You already have a set birthday and hair length since certain circumstances wouldn't work with certain dates/lengths.]