Yes please!
Sometimes I come across a person with a gallery of characters that aren't really my thing, but there is that one character that hits all my aesthetics. I don't want to follow that person because I know that I will be deleting a lot of notifications about characters I don't really want to see stuff about and it'd be dishonest to the person I'm following, but unless I want to go check every month on that character (which would be awkward) I wouldn't get to see any new art of them.
For situations like this, it would be cool to have the ability to follow just one character. It would work the same as subscribing to a user, the user would still get an inbox notif of your sub and you'd get any art uploaded to their gallery in your inbox, but it only applies to that character. Would be a cool quality of life feature!
then i join this site i actually though that by favoriting a character you get that feature automatically. but i would love that to be a thing!