Beatrix listened to this talk of power ups with her head tilted to the side. Given her lack of social skills, friends, and not watching the news in lieu watching all the anime/playing all the games/generally shutting herself inside a bubble, she knew just about nothing of these rumours. They sounded rather silly to the obviously-powerful esper. What desperate idiot would use such a method to gain power?

...

...Well... maybe it would help those foolish idiots that designated her as a Level 0 realise just how awesome her abilities were...

Silently poking at her barely-eaten meal with a pondering frown, Beatrix tried to decide if this weird method of leveling up was worth her time. After all, she had only intended to pay Torako back for doing her job. Still, a potential increase in power...
Eventually, temptation won out. Scoffing at Kyouma's attempt to inject logic into their actions, Beatrix simply said, "it's perfectly safe! After all, if it's already happened to other people, then there's clearly no problem, right?"

Crossing her arms smugly, Beatrix continued, "frankly, I can only see an upside! Unless getting knocked out hurts a lot. ...Er, did the legends say anything about that...?"