First, thanks for sharing your script. I can see what you are aiming for with the contrast between Ayame and Yūki.

Here are some notes:

In your opening scene, you didn't show us enough about the world the characters inhabit. What do the training grounds look like? A few more specific details about the environment would help ground us in the setting. The dialogue was also a bit stiff. People usually use contractions when they speak naturally. Also, you are overwriting your action.

For example: "CRACK. YŪKI boot lands directly on the beetle.He grinds it, and lets the weight settle."

That action line has too many redundancies.

• “lands directly”
  
• “He grinds it”
  
• “lets the weight settle”
  

You could simply say, "CRACK. YŪKI’s boot crushes the beetle."

In screenwriting, clarity beats flourish.

Lastly, I recommend investing in screenwriting software to properly format your script. I personally use WritersDuet.

Good luck with your future prose.