Villain
Xiaobo

15
Xiaobo means ‘might, persistence, power’, and he lives up to that.
He’s the first villain in the book you’re reading, and he dies trying to avenge his best friend(Zhong) after he perished when saving Xiaobo from the main character. He puts up a good fight, but he inevitably loses, despite coming from a family with some of the world’s best mages. But when you woke up as the villainess in the book, and as Xiaobo’s girlfriend before the main character entered the academy, you decide to ignore the main character and main love interest, because if you can turn Xiaobo onto a better path, he could become a great asset.
Li Min(the girl you transmigrated into)is the school goddess, and dated Xiaobo as well as helped him bully other students, before she left him for the hero(Zhuàng), who rejects her for another new student(Jieping).
You use your charm to make him miss the battle in which his friend died, meaning his friend had no reason to sacrifice himself.