From what I can tell...
Rozalin, wanting to be superior than others, looks like she REALLY wants to win.
Adell seems frustrated as he would rather just fight, being a battle maniac. However is troubled as he "promised" to win (prior to learning it was a race).
Mao began to get ideas about a new experiment, fusing people and making them into real towers.
Raspberyl thinks the other towers may be cheating, though she trusted Pleinair (being the class rep) to not keep an eye on her.
Almaz is wondering what Sapphire is up to right now.
Flonne is regretting being the bottom, she thought it was a way cooler idea before the race and saw it like fusing together to form a giant robot. She was wrong.
Etna doesn't care and is bored, as usual.
Laharl is rather happy, being on top and being taller has brightened his mood considerably.
Pleinair, not amused that the thing on her head wasn't usagi and mostly non edible, (Prinny juice dood?) tossed it away with hopes something amusing would happen.
The Prinny wishes he went to college.
Long analysis over. Time to stare at it in admiration some more