Thread:TyA/@comment-34425563-20190417034658/@comment-34425563-20190417155436

So it's an OC (original character) of yours. You could display it on online art sites like Pixiv.net and DeviantArt.com, along with a copyright note saying whether anyone else can (or cannot) use it (with your explicit permission, or not) on their own fanart or fanfiction. Being your own OC, of course you own its ©.