Hooray! Here it is! My entry for the Design the Character! challenge by Wakusei Aoshi. :d
...Yeah, I told you not to get your hopes up. xD; The pose is pretty boring. Honestly, I tried to think of an interesting pose to do, but my pose-drawing abilities are kind of limited. ._.
So. This character's name is Kor Schollen. That's his name on the picture, in a language I made up....

SINCE THIS IS A NEW CHARACTER, expect some long footnotes. xD

Anyways, for the challenge you had to make a "mysterious, yet colourful and silly character with a slight dark aura to them." Also, you needed heterochromia, wings, horns, and a crescent moon somewhere in the design. So here's what I've got:

Heterochromia: Red (actually, mahogany) and white eyes. I've always wanted a character with white eyes, so I thought it'd be cool. xD

Wings: Bat wings, with chain piercings. His left (our right) wing has a tattoo of his name on it. His wings were pierced and tattoo'd by a girl called Gliding Eagle, who runs a tattoo/piercing shop. She thought Kor was a customer at the time, so....
This sounds like it doesn't make any sense.
I didn't really want to do bat wings, so I looked up winged animals. The only animals with wings are BIRDS, BATS, AND BUGS. I didn't want to do bird because they were angel-ish, and I didn't want to to bug because there were fairy-ish... so I stuck with bat wings. "orz I guess I could have created my own type of wing, but I didn't want Kor to be too over the top.

Horns: When I thought horns, I thought ANTLERS.... I don't know why. xD I classify antlers as horns. :d Originally, he was going to have ordinary elk antlers, but they were too long and big... so I shrunk and compressed them. :d And made them black, just for fun. xD

Crescent Moon: Shape of his hair across his forehead. :d

Before I talk about the dark + silly + colorful + mysterious part, I'm going to post a character profile. (Because it's easier for me this way. xD;)

Name: Kor Schollen
Nicknames: Cory
Age: 125791 years (Looks around 18-ish)
Gender: Male
Height: 6'5 (Including horns), 6 foot (w/o horns)
Special Talent: Flying, obviously; misinterpreting situations (??); he can probably use magic, but that's undecided at the moment
Hobbies: Exploring the weird world
Likes: Ice cream, hamburgers, reading
Dislikes: Confusion (although he experiences it often)
Love Interest: A girl who calls herself "Gliding Eagle"
Personality: If he was in his original world, he'd be dark and serious, but he is silly and clueless in the human world due to his ignorance of the world.

Kor Schollen is a being from another planet. He was sent to earth to destroy humans just because. However, when he gets to Earth (Los Angeles, California), he finds himself overwhelmed by the ways of humans. Kor wanders into a tattoo/piercing shop run by a girl called Gliding Eagle. Realizing he has no place to live, Gliding Eagle takes him in and acts as Kor's "tour guide" to Earth.
The only problem is that Kor doesn't speak English.
The language barrier is a big obstacle for Kor, because he has a habit of misinterpreting things.
Kor is actually a gentle guy, and doesn't really want to destroy the human race. So he doesn't. Despite being pestered by the king every now and again...
However, because his mission was to destroy humans, he thinks humans are out to get him. Secretly.
So he's a little bit paranoid.... but with reason.

The "dark + silly + colorful + mysterious" part of his personality was the hardest part of the challenge. Kor is a reserved and quiet guy, giving him a dark and mysterious aura. He also doesn't speak English, making him all the more mysterious. However, he is silly in the way he doesn't understand humans, and how he thinks the world is out to get him when it's not. It's easier to see his silliness in action rather than me explaining it, so here's an example: [click]
(That's a made-up language he's speaking at the end. It translates to "Po... poison..." The girl is Gliding Eagle.)
I took the "colorful" part of the challenge literally, and made him wear colorful clothes. What he's wearing in the picture is not what he wore when he first came to Earth; Gliding Eagle picked it out for him.

I COULD PROBABLY SAY MORE (for example, I could talk about his language), but I've already talked your ear off here. xD;;;;;;; I'm really sorry. ""OTL

SORRY IF NONE OF THIS MADE ANY SENSE TO YOU, IT MAKES SENSE TO MEEEEE.........