A bit like in Bleach where knowing the name of your attack makes it more powerful
Monokuma
2022-10-26 03:19:49 +0000 UTC
Ah, friends... the only assholes you'll happily put up with. Proven by Gojo's penis joke at the end.
I find it interesting that this anime has actually turned monologuing your abilities to be a boon. Usually anime characters go on talking about their powers which just makes it easier to fight around them, but here revealing your power increases your output.