i pretty much just rely on my own computers, and maybe dropbox...
if i were to put my characters on a database, it'd be a custom-built one...
(luckily, all i need is a web host, i know enough html/js/css for my purposes)
pretty much because of all the restrictions/limitations built-into EVERYTHING else...
I'd never recommend this for a character database, in fact, I just don't recommend it, PERIOD, but...
They're kinda really buggy, and comments/PM's/image descriptions have some awful character limits.
I have a wiki there (created when the site still was functional) , and I am a moderator on another.
despite its flaws, there are ways to enhance it.
You can restrict edit permissions, effectively turning it into a private website.
No promises, but I CAN help you get just a little bit more out of the platform.
Just a thought. Again, the system is crappy. But, it's also free, and due to some of its features and even, vulnerabilities, you can easily make it a little bit more.
Another site you could try is pbworks
IDK how much they've changed since I created my account there, it's been a while.
It's also free (unless that has changed) , and VERY easy to customize nearly every element of your site! (which my friend who showed me it has been playing with)
Good luck finding a solution!