This is a wonderful piece, makes me jealous of your art skills as well as very awestruck (I believe that's the word).
Even if they are not related directly in story, they have nice parallels. There's a gif set on tumblr about and a long discussion post also there comparing pieces of their book PoVs.
I mean, they are the most close to their sigils from the ones known to be of their house (Daenerys, in the books at least, talks much of the dragon blood, how dragons don't cry and many others; and Arya the same, talking of her wolfblood and things like so. They have nice parallels, give it a look). This is
Also: I ship them, so there's that.