I smell a series...but anyway:
What are your standards for creating comic relief characters, if you use them? They've been mentioned periodically in trope talks, but there hasn't been a lot of focus on them.
Here are mine:
1) No bullying
I think society has moved past the need to have a character in the cast whose only purpose is to be constantly mocked, ridiculed, and insulted by their "friends". Thanks, but no thanks.
Even if I do have a comic relief character who gets derided fairly often, I like to give them at least one friend who can "meet them on their level"; so they can have positive/neutral interactions with others, too, not just negative ones.
And this friend doesn't have to be a "fellow idiot" or a "motherly sweetheart pushover" type; that just reinforces the idea that they're less of a person (can only connect with caretakers or people who are just as stupid as they are). Just another person who more or less appreciates them for who they are...AKA a real friend.
2) Give them background
This doesn't apply to every story, but if the tone is serious enough for most of the main cast to be given interests, depth, and backstories, you shouldn't be leaving the comic relief-type MC out of that.
And on that note, the "they play the funnyman to hide their feelings/cover up deep personal trauma" background is kind of overdone. Some people can just be joyous and silly for the sake of it, y'know? ^^; It doesn't always have to be a mask, as if happy people aren't real...
3) Let them drive once in a while
I think this one actually applies to all stories. Even super flat kiddie shows hand the spotlight over to a minor character occasionally, and this is a good thing.
Comic-relief characters are called such because they are around often enough to be considered a reliable source of levity for the story. But if they're around that much, shouldn't they also be allowed to propel the plot? At least sometimes...
And I don't mean by messing something up and creating a cascade of new problems for the more level-headed characters to solve. I mean by being allowed to solve a problem for a change. Or to make an important decision, or even just to say an important line.
I mean, if you've written them to be so useless that it doesn't make logical sense for them to do any of those things, I think you should examine why you put them in the story in the first place.
4) Let someone take their place
Basically, let someone else be the comic relief once in a while; while they get to throw in an insult or two. ^^ It's only fair...and by that I mean it lets the cast feel more balanced, so you can avoid the 'bullying' look from #1.
One of my favorite casts to write for is pretty much constantly passing the comic relief hat around from member to member. Of course, some are more consistently comic relief than others, but everyone gets a chance to be the joke of the day at some point, even the most serious members~.
And when that happens, the hat isn't immediately passed back to the 'default' comic relief character; I see that happen sometimes...it's okay to just leave someone else in their place for the duration of an episode, or a chapter. If you're telling a story with a significant helping of comedy in it (and if you actually have a comic relief character, you probably are) other characters should have the capacity to be funny. Not to break character and become jokesters, but to be seen in a funny way.