As the girls were dressed in their uniforms, which consisted of a white  jacket with a decorative rope, and a pair of gloves, Although what differentiated most was the complementary clothes, Kiana was wearing a a pair of thigh high boots a pair of daisy dukes and underneath them a pair of leather tights and a leather shirt, Mei was wearing high healed thigh high leather boots and a form fitting dress sweater
(AN:Correct me if I'm wrong as the manga makes it look like leather) 
As for Bronya aside from the same uniform as Kiana and Mei she was roughly dressed in the same clothes she had few months ago, she also carried a Houmu backpack.
While Mina having the same uniform, she was dressed in Winter camouflage Cargo Pants straight out of the military, and a pair of black military boot.

And Himeko was watching the leave for school.

Himeko*Thought*: The girls seem to get along fine with each other. Mei's cooking really helped/

Kiana: We're off for class.

Himeko: This will be your first exam after you've enrolled, so don't let me down.
*To herself* These girls sure do make me remember the good old days.

Kiana: Just wait for good news! 

As Himeko was about to take another sip of her beer, she noticed that hr beer can was gone, she then looked at  the window and sees Mina who took a deep gulp of the can, finishing the contents.

Himeko: How did that brat...

Adjutant: Major Himeko, We'll need you to report to duty.

Himeko*Thought/panic*: FORGOT ABOUT WORK!

St. Freya High.

As students finished their first class Kiana, along with Mina, Mei, and Bronya, who was sitting on her HOUMO Back pack, were talking with a couple of fellow student about the exam, which other students were doing the same.

Student #1: Kiana, aren't you worried at all. These exams must really be tough for transfer students.

Kiana: Hah! I'm a born g-nius!
These Exams are hardly a challenge for my innate abilities!

Student #2: What about you, Mina?

Mina: To be fair this is just a normal day in school for me anyways.

The a Girl with Grayish blue hair, blue eyes, and waring the same St. Freya uniform as Kiana with a blue Chinese shirt underneath the the vest, this was the class monitor Fu Hua.

Fu Hua: Confidence doth confer strength, Kiana.
But the Valkyrie trials are not to be dismissed lightly.

Mina*thought*: Who is quoting Shakespeare or Sun Tzu?

Fu Hua: As the ancient saying goes: Pride goeth before the fall.

Student #1*thought*: She's always elegant and dashing.

Student #2: KYAAAA!

Student #3: It's fu Hua senpai!

While other student's were squealing.

Kiana Was trying to process what Fu Hua just said.

Kiana: What? *Thought* Tried golf before a fall? (Does not Compute), Who the Hell does she think she is?

Fu Hua: Gifted you may be, charging headlong into a challenge, will be Ill-advised. For Impatience is the bane of success.

Kiana*thought*: Is she speaking English?

Mina*Thought*: Seriously is she some sort of a philosopher or something?

Kiana: I know all that!

She said with confidence.

Fu Hua: Apologies then, I may have spoken out of turn.

Fu Hua hen left, making Kiana: Frown a bit.

Mina*Thought*: Seriously who the hell did he quote earlier?

Kiana: Erm, Mei... Di she just say any bad words I'm not aware of? *Thought* And she's speaking Chinese right? 

Mina: Kiana... *Sigh*

Mei: I think she just want's you treat this test a bit more seriously.

Bronya: Subject Kiana is an idiot.

The day of the test.

Bronya stood in front of a combat mech, which charged at her but she managed to counterattack using Project  19c.

Then It was Mei's turn who, dashed at the mech, and cutting it in half with her Katana

Kiana turn and she made a somersault with a chainsword cutting the Mech's upper body part to pieces.

And now it was Mina's turn who stood there with a single handed European longsword, and her modified under-barreled attached blade, and Two mechs in front of her.

With Kiana and Co.

Mei: Mina sure loves a challenge.

Kiana: Well Since dad ditched us 2 years ago, she had been trying to protect me, and has often threatened every boy that even think's of going on a date with me.

Mei: Seriously?

Kiana: Yeah, but it mostly has to do with the Fact that mom did in the 2nd impact 14 years ago, and ever since then it was, dad, Mina and me.

Mei: I'm sorry...

Kiana*Sigh*: That's in the past.

Then As the conversation ended, the saw Mina sitting on top of one of the Mech's with her Monte Carlo in her hands while the sword was lodged in one of the Mechs servo, which was twitching, then Mina shot the mech right in the servo unit again, then it stopped twitching.

Mina: Is that all?! I'm really disappointed, I was expecting more of a challenge.

Kiana: That's Mina for you.

Bronya: The Bronya believes that subject Mina is vastly Superior to subject Kiana.

Kiana: SHUT UP PIPSQUEAK!

Bronya: The bronya is detecting high Levels of jealousy in subject Kiana.