I really thought the affirmation was a universal English-speaking thing, well there you go then! "Jolly" also works well, jolly good, jolly nice, etc.
Moving on though, I like the way the stars look. I also think the way Ket is drawn (light shading, the way the seats look comfy-yet-solid, etc.) reminds me a bit of the 80s X-men comics I used to have somewhere. Maybe that's also because Vektoria looks a bit like Storm (I must've said this before). Is that on purpose?