Don't worry, we can haggle! Springstar is a lot more economically flexible than Highstorm, I'll help you cover anything!

[She sure sounds both very cheerful and confident saying that... So it will be okay, probably?]

No, mister Eustace would be a kuudere. He's not rude or abrasive, just cool and aloof to those who don't know him. You have the right idea, though! There are just different kinds of "unapproachable but caring", tsundere being the most common but kuudere is a decent runner-up. Do you follow?

[inb4 all the dudes start sneezing today as if there's some weird allergy going around Kenos... oops?]