Green Flag: Kurapika. Kurapika is a little bean loaf who has done nothing wrong ever and has never made a poor decision in his entire mortal existance.
https://anilist.co/character/28/Kurapika
Red Flag: Homura Akemi is a wretched little creature who has made a large number of illegitimate financial transactions by Back to the Futuring the Stock Market which caused the Great Recession in 2008, frankly being fond of her is like being fond of Satan. Also I don't like her very much, take that.
https://anilist.co/character/38005/Homura-Akemi

Red
Excuse me if Im wrong cuz I don't know his version in Hakuouki but I know every other one and in each one he's cold blooded killer so I Imagine nothing is differend here (although besides that he's decent guy)
Green
Well he's very chill and nice gentleman, I imagine having tea with him would be great (except you propably would have to pay for it kekw)
to be fair hakuoki is an otome game so hes definitely not just a cold blooded murderer in there. id argue hes one of the better possible love interests honetly lolol! still sort of a reg flag though but its because he sorta is a blood drinking monster, though not by choice and he does his very best to resist it LOL
and yeah zhongli is so sweet. i dont even mind paying for the tea like whatever im broke but worth it
@heterostasis
Red Flag:
I don't mean to be rude but personally anything related to Genshin in someone's favorites is a huge red flag imo. i have nothing against the game in particular its just that I despise Gacha games.
Green Flag:
Miyamura is amongst the biggest green flags when it comes to anime MCs. This dude is like the most innocent and faithful guy you can find. Plus he is willing to do whatever makes you happy before what makes him happy (Thats the only reason he was able to deal with all of Hori's bs)
@Esdea Ig you got skipped so I will do this
Red Flag:
I have only seen a few episodes of dark gathering but I could already tell that this girl is the definition of Red Flags
Green Flag:
From what I have seen of trigun (I haven't finished it but saw a few ep of stampede) he is just a chill guy through and through. So far he hasn;t done anything that would be a a major red flag and so he is the closest thing to a green flag from your favorites (only among the characters I am familiar with)
https://anilist.co/character/67321/Koushi-Sugawara
This man is one of the Greenest possible flags.
https://anilist.co/character/260329/Chisato-Nishikigi
Smh can't believe you endorse cute child soldiers, Rotte Flaggen.

@KronosBach
biggest greeen flag there has ever been
yeah, I'm taking the easy way out for the red flag, but I just don't wanna have all my friends sacrificed, ya know...

@RossFrost
Can't say I've ever given it a proper watch, but I'm fairly confident in saying HSOTD is a red flag:
Fran's a massive green flag though, probably the most underrated Isekai protagonist I know of (...maybe cause she wasn't the one Isekai'd lol):

@sooshirohl
Major Green Flag
Major Red Flag
Everyone else (But no seriously, you've got too many characters on your favorites)
True Major RF
Especially since you put him beside Narancia, that's too vile
My guts told me that Hisoka fans are always up to no good...
josee's a red flag?? ??
yeah to be honest i was going through all my series and just adding general characters i liked from them into my favorites although i should probably go through again and narrow it down more
diavolo and hisoka are compelling characters to me but i do not support their actions especially not hisoka
Since there was an accident, I guess I gotta test your favorites list as well... @HomuraHolic
Major Green Flag
Major Red Flag
No, just no... (she's the worst first impression that I ever witnessed, although I'm sure she'll get wholesome but still, no)
But why... (I'm not saying that she's bad per se, but why her...)
In Chloe's case, I know she had those sus scenes when she was first introduced lol, but she's usually one of the more mature characters in the show, even more than Rin and Luvia who are supposed to be the girls' senpais lmao.
And for Kuroko, I just like her design and powers the most in the Aru series. Also, although she may behave crazy around Misaka, she cares deeply for her.