After ch16: For someone who's lived two lives, she still acts like an ignorant and entitled 15 year old.
Author shouldn't have used the past life troupe, it adds nothing to the story, female lead is just a whiny prepubescent-teen who's been treated as a pariah.
Throw in an older male character that "saves her" but treats her as insignificant, and there's your typical tsundere romantic lead. Of course, they live together and he teaches her whenever he feels generous.
Ice