Ooh I wanna do the top one! Also, this can be your OC, if you want. :)

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Name: Stoneclaw

Species: Lava dragon 

Age: 1,300 dragon years (13 in human years)

Gender: Male

Abilities, Powers, or Skills: Is immune to heat and fire, can control and summon lava.

Personality: Strong and brave, not that smart, a brutish fighter. Is happiest in battle.

Backstory: Stoneclaw was born in the fantasy world of Nevrima, on a continent called Huuron. He grew up inside a volcano with his father and big sister, as his mother fell into some water (fatal to lava dragons) soon after he hatched. His sister is seven years older than him (which is hardly anything to a dragon) and she grew up and left to help build the king's new palace. He (quite reluctantly) came with her at the age of 1,000 (10 in human years). He immediately joined the army and has been their ever since.

Likes and Dislikes: Dislikes cold, sitting still, and learning of any kind, likes battle, fighting, battle, battle, and fighting. Also fighting and battle.

Friends and Allies: He hasn't been able to make friends, as he's more intrested in killing dragons than getting to know them. His sister is sort of his ally, though, she owes him for this one time he fought off someone trying to rob her.

Enemies and Rivals: The river dragons are at war with the lava dragons, so he hates them obediently. He also probably has like a hundred dragons who have sworn to kill him for revenge because he killed their family members in battle.

Quirks, Habits, and Common Mistakes: He literally never takes the friendly/diplomatic route. If there's a problem, he usually just kills the dragon causing it. Also, he cannot sit still.

Other/Miscellaneous: Uhhhh nope!

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Since this is now your OC, you can totally adapt it as much as you want! I think I kind of overdid the "brutal killer" aspect, but I'm not sure. Adapt and change him as you'd like! 

Gender may not nessicarily obvious, some people's artstyles are more feminine, some more masculine.

tHis baby is pReCioUs ahh- 

The character below belongs to a story Im writing, but I didnt know his appearance... Can I use a variation of the one in the picture? 

Name: Axel McCarthin

Age: 16

Gender: Male

Abilities, Powers, or Skills: Axel is a great artist, and he's very fast too. He can also see more colors than most, and his hearing is perfect.

Appearance: (in picture)

Personality: Axel is bright and outgoing, he loves rainbow colors and loud noises, he's ADHD and hyper. He's very self-concious, though, and spends a lot of time worrying how others will see him.

Backstory: (super long) Axel grew up in a small town with one school. He loved it, but when he was 15, they moved to a big city very far away. Axel had to go to a big school and make new friends, which, being Axel, wasnt too hard... Back where he used to live. Now, here, he's the outsider, and everyone already knows eachother. So Axel shrank into himself and kept quiet, didnt blurt out the answers or ask for help, he silently struggled through all the math (his weakness ahh) while others laughed and talked. He started admiring Max, the smartest kid in his class, for doing all the work so easily. Finally, at lunch one day, Axel gave up and asked Max for help. With Max, everything made sense, and Axel realized that he liked having Max around, more than he used to with his old friends. They became friends, and Axel opened up a bit. He started to talk again, but only to Max. He wasnt eating, he kept his head down, and he was only in two classes with Max- which meant in the others his grades diped low. His parents were puzzled, wondering what had happened to their bright little boy. Axel still wouldnt eat, only taking a bite at dinner and then going to bed- but he couldnt sleep either. Axel started to get sick and one day didnt show up to school. Max was worried, he found his adress and went to Axel's house, where Axel was in bed. Max brought his homework and they started to do the math, going through the problems again, but when Max left Axel just fell back into bed. Every day after school Max came over, where Axel was waiting. They did the homework, talked a bit, then Max had to go and Axel was quiet.
Then one day Axel wasnt there, and his parent's told Max that Axel had been taken to the hospital, where he wasnt allowed to have visitors. Max went home, but he felt so aching and lonely inside that he finally picked up his phone and texted Axel.
'hello' he said, and Axel told him everything, how he wasnt feeling well, how it was hard for him to focus, how he wanted to make friends but couldnt. and little by little Max helped Axel get better.
Eventually, Axel was allowed to have visitors, so Max went to the hospital every day after school. 
And then Axel went home, and Max told him about what he missed, and Axel went to school again, and Max helped him make friends, and slowly Axel became his old self again.
And through it all he became closer with Max, but he never ever told him how he felt.

Maybe he will, eventually. 

Likes and Dislikes: Bright colors, Max, food (he cant get enough after practically starving himself) 

Friends and Allies: Max Brighton, and he's sorta friends with Benjamin Sandy and Connor Duell (Max's friends)

Enemies and Rivals: No one but hunger.

Quirks, Habits, and Common Mistakes: Axel tends to say the wrong things sometimes, and he's very foolish around his crush. He also is a tad bit too excited about things.

Other/Miscellaneous: He is gay. And he has a huuuuge crush on Max, although Max doesnt know about it ;D