Oh yeah i like this idea! I don't mnd checking the character's ownership log, but that would make it a lot easier to check a few ocs at a time, or just figure out how you go tcharacters to sort them or what not!
I'd like to suggest visible transfer notes/comments like "gift" or "trade" on the account transfer history found here. When you can't remember why you transferred a character to someone, you have to click that character's profile, hit their ownership, and check the transfer history which can get tedious. Having the transfer notes right there in the account transfer history would make things much faster and more convenient, imo!