I wasn't really sure where to start on this honestly... though I figured I would go onto a few key things as well as a few revamps to on of the more prominent being Marcus.

This is Marcus in his most natural and unmodified form.
He stands around 6'1'' and weighs around 170 in Lbs while his tail is about 4' 1''.
As you may see he has digitigrade feet (Not just because they are easier to draw!)
Though your probably onto looking at his tongue by now, the longest it has been pulled out is eleven feet. Marcus himself isn't sure how far it could extend at all and quite frankly he is a deal paranoid of it along with how it seems to literally "Come from nowhere." Another interesting note is that his tongue is sensitive enough to taste scents in the air, however as that he has a working nose he isn't inclined to "taste" the air at all really.

Now the next bit that might come to mind is that probably very sharp looking set of teeth that he has there. It he were so inclined he could chew through most enchanted metals (Though more than a few bites is pretty similar to chewing ice for two hours straight.) Interestingly enough he has the choice whether a bite would sheer off a hand or if they work as though the are as blunt as a cow's tooth. It really is more second nature depending on his mood and what he wants to do with those pearly whites of his.

Maybe something slightly more interesting would be his eyes, relaxed labeled as "1" they are are usually a clear impeccably crystal blue when relaxed or an orange when his mood is aggressively off. The pupil is rounded as per his fancy. At example "2" it is his natural state of being slitted, relaxed the color of his pupil tends to be a darker yet still clear blue, while when aggravated or otherwise aggressive it turns to a bright vivid green in color appearing to give off a soft glow even.

I am not even going to begin to go over the current choice of attire that I have drawn now... Rather I will go on about the little sprite like things that are floating around. They are actually highly compressed balls of super heated air wrapped in the thin layer of glistening magic. These as once can imagine can explode with concussive force that can deafen and even knock out random annoyances, they are rarely fatal unless used in quick succession, though they have been known to set things on fire at times. They also serve as a nasty surprise to those that think they are pixies and the like if the controller is in a particularly sour mood.

Other side notes I suppose...
Yes, Orientation is completely unbiased
He appears to have a mix of both lupine and vulpine characteristics while his tongue is tapered and reptilian in appearance. (Don't ask why since I don't know.)
His tail is almost silken in softness and he rarely appreciates others making use of his tail unless they are well known to him and trusted, it's one of those random quirks that he has among other things.... like eating... in a couple senses of the word too. Yeah I know terrible joke though it seemed appropriate.

*I wrote this all up whilst tired and in an off mood... so this might be all a big bleh, I might clarify ts all in other ref sheets or a profile page... I'm not sure...