Since we don't have any audio for how Kheil sounds, we have a little bit of leeway.  In my head, I kinda picture her with something of voice similar to Korra from Legend of Korra, so let's go down that route.  Be sure to read the first 30 panels of the comic so you can have a good idea of how to voice her.

Link to comic: https://www.supercellcomic.com/pages/0001.html

Born and raised at the prestigious Nasriaten Academy, Kheil is an excitable little go-getter who doesn't quite realize the grim reality of her "child soldier" destiny.  She's devoted her entire life to mastering the art of war, and is widely recognized as a skilled martial artist.  But although she's embraced her fate with gusto, she remains stuck in that childlike mindset where EVERYONE needs to know how awesome she is.  Especially her Dad.  Who never seems to be impressed no matter what she does.  (I stole most of this from her character info page)  So basically a slightly younger Korra with daddy issues.

As far as accents go, I'd like to stick to North American, but feel free to make multiple submissions with different accents.

To set the scene, she is psyching herself up for an obstacle course test.  Although she's aced it a dozen times, her father keeps failing her and she doesn't know why.  Befuddled, she has no other choice than to go all out... as usual.

Make sure she sounds Excited, Insecure, Frustrated, and Focused at the same time.  Feel free to experiment with other emotions as well.

Choose any of the three lines, or all of them if you like.  But please send no more than 5 submissions.  That'll give you plenty of opportunities to experiment.

Here's a link to her info page if you'd like more info: https://www.supercellcomic.com/cast.html#castimg-1