[zephyr325]

Oh, I almost forgot...

Here is another secret regarding Tatenashi, the student council president, finally revealed in vol.6

She is...

Spoiler for Spoiler warning!!:

She turns out to be the representative pilot for Russia, not a candidate.

Unlike representative candidate which could be more than one, (and is most likely more than one all the time) there is only one representative pilot for each country.

No wonder she is so strong...

It seems that she is strong enough to earn a special right to temporarily choose her national affiliation, which enables her to become representative pilot for any country
(I'd presume that the goverenment that wants her as a pilot would have to make a formal request first...and she probably has choice to either accept or reject it)