Please recommend manga where one of the main characters is aligned with evil side (demons, undead, mafia, etc) while not necessary being evil themself. It is ok for the MC themself to range from completely evil to completely innocent.
Bonus points if it is fantasy.
Bonus points if MC is female.
Bonus points if MC is a demon king.
What I've seen (my personal preference):
Perfect:
https://mangadex.org/title/36283/looking-up-to-magical-girls
https://mangadex.org/title/20764/maou-no-hisho
Good:
https://mangadex.org/title/10457/sekai-maou
https://mangadex.org/title/26052/mage-demon-queen
https://mangadex.org/title/35092/yuusha-wa-shimei-wo-wasureteru
https://mangadex.org/title/31408/negative-hero-and-demon-king-s-general
https://mangadex.org/title/52948/uchi-no-maou-ga-tenshi-de-tsurai
https://mangadex.org/title/28404/slime-ga-nakama-ni-natta
Ok:
https://mangadex.org/title/43790/minotaurus-sweetheart
https://mangadex.org/title/57280/maou-no-jinji
https://mangadex.org/title/21177/goblin-is-very-strong
https://mangadex.org/title/52098/loli-hero-and-demon-lord
https://mangadex.org/title/49384/isekai-mokushiroku-mynoghra
https://mangadex.org/title/52602/her-majesty-s-swarm
https://mangadex.org/title/44992/i-was-summoned-by-the-demon-lord-but-i-can-t-understand-her-language
https://mangadex.org/title/31843/kanako-s-life-as-an-assassin
https://mangadex.org/title/41059/maou-no-musume-wa-yasashi-sugiru
https://mangadex.org/title/28892/maou-sama-to-kekkon-shitai
Meh:
https://mangadex.org/title/29421/vacation-maou-to-pet
https://mangadex.org/title/25495/maou-no-ore-ga-dorei-elf-wo-yome-ni-shitanda-ga-dou-medereba-ii
https://mangadex.org/title/9472/maousama-chotto-sore-totte
https://mangadex.org/title/1389/superior-cross
Bonus points if it is fantasy.
Bonus points if MC is female.
Bonus points if MC is a demon king.
What I've seen (my personal preference):
Perfect:
https://mangadex.org/title/36283/looking-up-to-magical-girls
https://mangadex.org/title/20764/maou-no-hisho
Good:
https://mangadex.org/title/10457/sekai-maou
https://mangadex.org/title/26052/mage-demon-queen
https://mangadex.org/title/35092/yuusha-wa-shimei-wo-wasureteru
https://mangadex.org/title/31408/negative-hero-and-demon-king-s-general
https://mangadex.org/title/52948/uchi-no-maou-ga-tenshi-de-tsurai
https://mangadex.org/title/28404/slime-ga-nakama-ni-natta
Ok:
https://mangadex.org/title/43790/minotaurus-sweetheart
https://mangadex.org/title/57280/maou-no-jinji
https://mangadex.org/title/21177/goblin-is-very-strong
https://mangadex.org/title/52098/loli-hero-and-demon-lord
https://mangadex.org/title/49384/isekai-mokushiroku-mynoghra
https://mangadex.org/title/52602/her-majesty-s-swarm
https://mangadex.org/title/44992/i-was-summoned-by-the-demon-lord-but-i-can-t-understand-her-language
https://mangadex.org/title/31843/kanako-s-life-as-an-assassin
https://mangadex.org/title/41059/maou-no-musume-wa-yasashi-sugiru
https://mangadex.org/title/28892/maou-sama-to-kekkon-shitai
Meh:
https://mangadex.org/title/29421/vacation-maou-to-pet
https://mangadex.org/title/25495/maou-no-ore-ga-dorei-elf-wo-yome-ni-shitanda-ga-dou-medereba-ii
https://mangadex.org/title/9472/maousama-chotto-sore-totte
https://mangadex.org/title/1389/superior-cross
