There is no function for co-ownerships currently.
Im not sure if this is an actual function that exists but I see most people who co-own characters just uploading them to each persons page separately. Maybe there could be a function that allows multiple owners of one character?
As far as trading and deleting the character goes maybe every co-owner would have to vote yes for the character to be transferred or deleted? Idk
I think this is a great idea! It's useful for those who co-own characters, but don't know whose account to post them on~
PLEASE implement this. I have a secondary account for my co-owned characters atm and I hate having to do it...it's a fix since we both own and post art we get for the characters but man, I'd rather just have them up on my account and my friend have them up as well :c