Moar Tooth/Jack sketchiness

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I can't stop drawing Tooth/Jack ;___;
But I saw this concept art, and I just had to. [link]
How gorgeous is it? Just the way she's holding him and asdfghjkl perfection. The character designs used as well, holy shit. Tooth looks freaking badass. Jack reminds me of Edward Scissorhands xD
It definitely makes me wonder if Nightlight in the books is actually Jack Frost, because the original Jack designs are so similar to Nightlight's design in the books. And apparently when they first started brainstorming ideas, William Joyce's Jack Frost was "a fully fledged Guardian character". The concept artist describes Joyce's Jack as "clad in a musketeer meets Edward Scissorhands style outfit". Sound familiar?
I kinda don't want Nightlight to be the precursor to Jack Frost (idk why, they just seem like totally separate entities in my head thanks to the movie interpretation) but it wouldn't surprise me if that turned out to be the case.
Also apparently when brainstorming designs the team suggested that the artist use Sid Vicious from The Sex Pistols as inspiration xD I screamed when I read that, lol. It explains why Jack is such a little punk. Some of the designs had him really punky though.

I also had a go at giving Tooth hummingbird wings. The right (or left? HER right) wing looks a little awkward but eh.
I mean, she's supposed to be part hummingbird. But in the book she has these huge great definitely-not-hummingbird feathered wings, and in the movie she's got insect wings. Sooo...
Jack's butt though. I didn't know how to draw it so he didn't look too bootylicious, but now it just looks like he has no butt. JACK, Y U HAVE SUCH SMALL BUTT. EAT MORE CREAM CHEESE DAMMIT.
And yeah, apologies ;___;