Is she planning to allocate seats with some accounting for relative size of countries?

Yes.

No one else wants to meet her standards with respect to reds.

Oh well.

"It's something."

"It is."

Someone makes a cute documentary about the Cene blue and her entourage of elementals. She is a charming little kid.

Cute.

She hires someone to do first-pass interviews of orange child-wranglers to get it to a manageable number. They need to be able to work with elementals and with Maurabel and in the same room as reds.

There are oranges who qualify!

Great. She will interview those ones personally.

This one teaches green kids and finds elementals really fascinating and is so upset about people mistreating them. This one runs grey after-school programs and has opinions about letting young children be young children and have play-focused learning. This one teaches orange kids and has a elemental friend who lives in her apartment's rooftop gardens.

Cool. And they can handle the possibility of red students? Big world. Possible some managed to hide.

They don't have to touch them or anything they touched, right?

She is going to be set up to avoid the necessity but if something happened, two-year-olds being two-year-olds, they would have to cope and not lash out at the kids.

They're oranges, they're not going to physically attack the children. They'd want the day off so they can go shower, though.

That's fine.

Are there only those three applicants?

No, there are lots more! 

Great, she might need more than three.

No shortage of candidates!

She narrows it down by how much she and her more closely cooperating elementals get along with them, with a view toward diversity of previous castes of students.

She can get teachers of every caste of students if she wants. The blue and green teachers are accustomed to higher pay.

She thinks she will pay them all at the higher rates. The lower the typical teacher pay the more of the caste there will be running around to wrangle, after all. And she'd like them to really want to keep their jobs.

Then will she give the blue and green teachers a bonus on top of that?

...she is going to pay her child-wranglers the same amount. They can get bonuses if she likes their performance.

Weird.