>>9938901There's two purple dragons - the small male wyvern named Cyclo (in-lore he's the source of all Wind magic) and the bigger, female dragoness named Gust (who's the third biggest dragon of the line, behind Ashwing and Elandra). Aria is the elf girl that happens to be packed with both characters.
>>9938915Why are Elves sets so expensive now?
I mean, they're old sets at this point, and they use a lot of parts (like the dragon and other animal heads) that are no longer in production. Also a lot of bricks in colors that aren't commonly used and therefore are harder to find. It's easier these days to just get them parts-out from Bricklink, though you'll have to order ever brick individually. I was only interested in the dragons, so it wasn't as bad as, say, trying to build the entire Queen Dragon's Rescue set, castle and all. Still a pain in the ass, and I did it years ago when they were cheaper than they are now, but it was worth it - I find they're better build and have better articulation than most of the Ninjago dragons - and this is coming from someone who owns Firstbourne, Stormbringer and The Overlord.