When Honkai: Star Rail debuted, players were intrigued with the Break Effect system, but it never became meta as it was too tedious to be worth the time. Plus, playing on Auto basically messes the entire idea up. However, later on, HoYoverse attempts to make Break Effect a more relevant mechanic, starting by releasing Ruan Mei, who's the best character to bring if you're aiming to break the enemy's Toughness, then a Break Effect-centric character like Xueyi.