Anime

There was so much good stuff in this episode!

The principal exploiting the clueless power gamer in Yumiella to get her to enter the tournaments.

Yumiella giving non-game context useful advice to help Alicia improve her Light magic.

Watching Alicia behave like a good person away from the 3 jerks was great.

"Yumiella Punch" deserves some explanation of context:

This goes back to the history of anime, manga, and live action shows, where characters are yelling out their attack names as they attack, so in all shows for young kids, all attacks are named. (See Bravern)

So if you were a young kid growing up in Japan, you're reading manga and watching shows where characters are yelling out their attacks, this naturally enters your own play, so you yell out "(your name here) punch!!!"

So Yumiella naming her punch is very puerile, i.e. kiddie-like.

Usually when we see characters yelling out their own ordinary attacks, e.g. "Ataru Punch!!" the result is disappointing, like some kid doing this while attacking in a real fight, and finding out it does nothing to enhance the attack, and they just wind up looking lame.

But this time, Yumiella Punch is a terrifying and effective attack, capable of breaking a high-level sword.

Therefore naming an extremely powerful attack with a kiddie-like attack name is such a non-sequitur that it's funny.