Concerning OC Creation

Good to know! Would the staff be willing to accept an OC that's related to a Canon if the user can create a believable backstory that explains how they're related?

I had an idea to connect an OC to Castiel as his daughter. As for how... It's a long explanation that ties into another OCs backstory, but I'll still explain.

We know that the Greek/Roman gods exist in the show from the Prometheus episode. The Greek/Roman goddess Eres (OC), goddess of chaos and discordance, is tired of operating in the background causing destruction and chaos and desires to be worshipped again. To do this, she devises a plan to create a hybrid race of monsters who are stronger than both parents combined and use them to build an army powerful enough to conquer Earth (and possibly a few other realms) and rule as the sovereign diety. Up until the time of Sam and Dean Winchester, she had been relatively unsuccessful, but after the Winchesters stopped the Apocalypse, she paid very close attention to their exploits believing that she would find the key to her success through them. She learned about the Mother of monsters, Eve, and her power to create and combine creatures at will and theorized that perhaps a sample of her blood would allow her to mix a concoction capable of making the DNA of monsters malleable enough to interbreed them.

Although, she knew Eve's blood wouldn't be enough on it's own, Eres waited for the right moment to collect her sample without drawing the attention of the Winchesters. She then went on to collect several other ingredients, including her own blood to randomize the inherited traits of the hybrid offspring, but she was still missing something. She had what she needed to alter a monster's DNA, but she couldn't make one mate with a monster outside of its species. She needed something that would make them suggestive without really affecting their free will, then she remembered the effects of a Cupid's arrow. She theorized that if she could manage to get a hold of one, and modify it if necessary, she could use it for her goals.

Eres would need a distraction so as not to draw unwanted attention from the Angels, but as luck would have it, the Angel Castiel had absorbed all the souls of Purgatory and was using his amplified power to assert dominion over Heaven and Earth. She used the resulting havoc to forcibly take a Cupid's arrow, killing it in the process. Now she needed to test her concoction and modified arrow on a monster and she settled for a Siren as they had a natural ability to put victims in suggestive states, which could become a useful backup if the modified arrow failed. By the time Leviathan was unleashed unto the world, Eres had found a Siren nearby living as a human woman named Daphne. She devised a plan to introduce the concoction to the Siren's blood by disguising herself as a mugger and attacking it with a knife dipped in the mixture.

Ultimately, this proved successful as Eres had managed to cut the Siren deep enough to put the mixture in its bloodstream without seriously injuring it, but having to get away with Siren venom on her. She kept watch over the Siren, waiting for an opportunity to finish her experiment and it came when Daphne(Siren) stumbled upon a naked, delirious man crawling out of a reservoir. Eres recognized him as the vessel of the Angel Castiel, but she could sense that his essence hadn't disappeared. His grace still remained even though he was suffering from amnesia. Eres wasn't sure if the mixture would work on an Angel, but she was curious and took the opportunity to use the modified arrow on Daphne, who immediately felt compelled to care for the strange man.

Eres watched over the two and noticed that even though a Siren's instinct is to feed on devotion, it appeared the modified arrow twisted this around to where Daphne felt devoted towards her charge, whom she named Emmanuel. Eres knew it would be difficult to dose the Angel with her mixture as Daphne would be instinctively protective over him so she carefully plotted to stage a break in to get close enough to cut Emmanuel with the same knife she used to cut Daphne. This was also successful if a little risky, and Eres continued to watch over them, elated when they finally consummated their "union". She wouldn't know until later whether or not the experiment was a success as Emmanuel pulled away from Daphne from none other than Dean Winchester, who heard of Emmanuel's healing abilities and hoped to use them to cure Sam's insanity. It wasn't until a few months after Castiel regained his memories that Eres would learn that her experiment succeeded...

Enter my OC, an Angel/Siren hybrid who ages twice as fast as a human and carries the weaknesses of both parent species to balance out her abilities.

I understand, but may I ask why for constructive criticism purposes?

Understood. Do you allow OC witches to be played?

I'm having trouble getting a picture to appear properly in my character application. Do I need the image address or the link location?