I just remembered I made them! For those who were wondering, here's what the seconds'. of 5 of the 7 Aarkar clans look like (Osaffor and Shax-Kuga don't have any).
So far, only two of them have appeared in The Frozen Maw, and some will never be seen. You'll also notice that you've probably seen Bjorn somewhere before, since he's the Aarkar depicted in Opali's book! (Actually, if you look closely, you'll see foreshadowing all over my Tumblr's XD. Now that some information has been revealed in the fic, dear readers, I invite you to go on a treasure hunt!)
Several details here will have caught your attention, don't worry, you'll get your answers when the time comes in the fic. As for the dragons that inspired Arun, Gnasha, and Hildar, I plan to post about the dragons I invent or those that deserve an information page. (I'm hesitating, however, whether to use a dedicated blog for them rather than posting them here; let me know what you think!).
As for the others: Eldrid (Myrrah's second-in-command) is half Typhoomrang; Bjorn (Karaï's) is half Crimson-Goregutter; Haldor (Kirin's) is half Skrill.
Arun (Aldröna's) is half Roksalt; Gnasha and Hildar (Jörmegaëlir's) are half Kwheel.
(Don't mind Gnasha's proportions XD, I'm not very good at drawing characters in profile. Furthermore, these drawings are two months old.^^')