Ho Yay: Seimei and Hiromasa. Seimei and Hiromasa. "Oh, I don't care about the world, but I'll save it if you really want me to."
Comes up in the sequel too. They really don't want each other to die.
Moral Event Horizon: Genkaku didn't seem all that disturbed when he offers his children up as sacrifices to the gods or when he kills his wife.
Big-Lipped Alligator Moment: The dream Seimei has in which he kills Kagura at the beginning of episode 11 can be viewed as this. Neither is it mentioned again nor does it play any important role in the story.
Breather Level: Surprisingly, some of the higher stages of certain skin dungeons can be this. The most prominent example of which is probably Ōtengu's Storm Peak, as difficulty takes a nosedive after surmounting stage 8, which is That One Level.
Broken Base: The Vietnamese playerbase of the game was split vertically in two following the October 16 update for the Garena build. The update had allegedly revealed a hitherto obfuscated map of the Chinese naval territories, which included the Vietnamese Trường Sa and Hoàng Sa island chainsnote While this development is nothing new, as the Chinese government had previously claimed ownership of many foreign islands and peninsulas in the Eastern Sea despite international opposition, the old in-game map didn't show this. It was speculated that something went wrong during the patching process which replaced the map with that of the global version, which always showed the new territory markings.. Naturally, many Vietnamese gamers didn't take lightly to this and boycotted the game, and Garena decided to just discontinue publishing and development of Onmyōji in the country altogether. This angered the remaining players who didn't want to let politics get in the way of their enjoyment of it. As of October 19 2019, the Garena build of Onmyōji is officially dead.
The current must-have SSRs at the moment are Onikiri and Hakuzōsu, the former due to his ridiculously-broken passive, and the latter to even attempt to resist that passive. Whereas older SSRs who hit hard could be defended against simply by putting on more shields and armor, or by crowd-controlling, Onikiri just makes everything a freaking joke with his absurdly-powerful kit that ignores most manners of defenses on top of dealing obscene amounts of damage in a single swipe, often allowing him to win matches in one hit. And everybody uses him in PvP now, which makes climbing the ranks a monumental task for those who don't have him, or worse, having to fight those who do.
In the previous meta, everyone uses Ootengu, or failing that, Ubume (or sometimes both), usually with Seductress soul, putting out more area of effect damage than anything else in the game. Ibaraki Doji may be popular for farming, but Ootengu and Ubume are popular for everything. They are, quite bluntly, horribly overpowered and players not lucky enough to get either of them are basically second-class.
That's nothing compared to competitive event bosses like Uber Orochi. There are, at most, maybe 3-4 valid teams that can be used to get the high damage scores necessary to get the top rewards, and the only things that vary between them are the choice of primary DPSnote almost always Ibaraki Doji, although others can do in a pinch and sometimes Shuten Doji is more efficient and the pushernote the opposite of a puller, a shiki that can damage and slow all enemies to get your team more actions- it's almost always Kamikui, but Kiyohime equipped with Dawn Fairy soul is also a valid, if uncommon, option, and maybe you can use Kaguya instead of Oitsuki, although nobody does. Otherwise, the use of both Ushi no Toki/Ushi no Koku Mairi and Bukkuman/Shoyo is literally mandatory- they're so insanelyoverpowered against high HP bosses that if you don't use them it doesn't even qualify as Self-Imposed Challenge- you're just messing around wasting your time.
This is maybe a contender for the Most Triumphant Example of Complacent Gaming Syndrome- uber bosses have daily leaderboards that show the team compositions of the 100 most-successful players each day, and it's not uncommon for upwards of 95% of the top players to be running literally exactly the same lineup. This was, for example, literally true during the Shiranui's Song uber boss, where exactly 95/100 of the top players were using the lineup of Ushi no Toki, Bukkuman, Oitsuki, Kamikui and Shuten Doji, and the other five were using the lineup of Ushi no Toki, Bukkuman, Oitsuki, Kamikui and Ibaraki Doji instead.
Demonic Spiders: During high levels of the Netherworld Gate challenge, Kyonshi Ani. Although the enemy shikigami stop leveling up once they hit level 40 at stage 31, their stats continue to endlessly increase to impossible levels until they're easily capable of killing even the most powerful teams of shikigami in only a couple of hits, meaning the only chance of progressing beyond a certain point is getting in massive overwhelming damage to take them out before they can kill you. Unfortunately, Kyonshi Ani passively counterattacks whenever another shiki on its team dies, with a very high chance of stunning whatever it hits, so unless you One-Hit Kill everything (or at least all the Kyonshi Anis) in a stage on your first attack, your shiki is going to take a major counterattack- which, since your DPS will naturally incline towards being a Glass Cannon, can end up being enough to kill them in one shot, especially if there are multiple Kyonshi Anis in the stage all hitting them at once. Plus if you leave even one of them alive, they'll attempt to revive every one of their fallen allies with the time they bought by stunning your DPS. The potential stage 50 team comp of 6 Kyonshi Anis is every player's nightmare.
Draco in Leather Pants: You can bet Yaobikuni is bound to get this treatment in fan works. It is completely Justified as the bigdamnreveal arrives way too late and portraying her accurately would be a big fucking spoiler to those not having reached that far in the story, and this is not to mention her originalcharacterization's having already been established in the minds of the majority of fans.
Ōtengu is also getting this as well, what with his being a HeelFace Revolving Door. Yuki-onna is also a frequent victim of this, as her villainy is not revealed until fairly late in the story.
SeimeixKagura. Being the two master game icons and frequently sided together (by the game itself, no less), this seems to be the most populated het ship in the game. Although the ship is more popular towards eastern fans as western fans prefer to ship Seimei with Yaobikuni instead probably due to the fact that they find Seimei having a relationship with a kid a little too disturbing.
Seimei x Yaobikuni. Popular enough among Chinese fans and the western fans, as stated above.
The constant Ship Tease between Seimei and Yaobikuni eventually becomes this when the latter's villainy is revealed.
Fridge Brilliance: The game includes references to one of Onigiri's historical names, Tomokiri (lit. equal cutter). In the story, he mass-murdered his own kind.
Fridge Horror: The possible fate of Yōko's other victims. Just think about it: Koi-no-sei isn't his first and only; Kappa has reported cases of yōkai going missing to the onmyōji before Koi-no-sei is kidnapped herself. At the end, only she is seen rescued. It can be very scary to imagine whatever happened to the rest of Yōko's victims and what he might have possibly done to them.
Fridge Logic: The game has a crossover with Bleach. Anachronism aside, this quickly makes one wonder how the shinigami from the latter canon with a completely different afterlife with a completely different set of lore and rules are going to integrate with the world of the former and its Buddhist-style jigoku.
Not that the Hōzuki crossover is free from this, with the existence of two different Enma in the canons. If the "idol" talk is anything to go by, this is probably explained as a result of time-travel.
Yōko's defeat at the end of chapter 7. Kooooon kooooon, indeed.
Thanks to the fact that Seimei's Deflector ShieldNo-Sells any purely debuffing skills except for that of Ame-onna, watching A.I Amanojaku Red tries to provoke your team members or A.I Dream Eater tries to put them to sleep can be quite hilarious.
Germans Love David Hasselhoff: While the game is developed by a Chinese studio, it has a steady Japanese fanbase enough to spawn twomusical adaptations both performed in Japan by Japanese actors and even a themed cafe service in a cafe in Tokyo. It helps that the game is about Japan, revolves around Japanese folklore and history and stars an All-Star Cast of big-name anime voice actors.
Heartwarming Moments: The entire 1st side story. The fact it introduces the incredibly adorable Kurodōji and Shirodōji helps.
The Hair Eater is confirmed to be in love with Seimei in canon. It surely doesn't help matters that his sister is completely supportive of this.
Ibaraki-dōji's unquestioning and, frankly, masochistic loyalty toward Shuten-dōji comes off as this. Made even more obvious by this Valentine's Day mini-drama in which it is revealed that Ibaraki-dōji was the one sending Shuten-dōji alcoholic chocolates instead of Momiji.
Even though Hiromasa is clearly enraged at Ōtengu for having betrayed him and turned to evil, the former says to the latter that he still considers him his friend no matter what, which isn't help by the infamous flute duet in episode 19.
Upon learning that Sakura-no-sei is in love with a human, Momo-no-sei tried to prevent her from pursuing that romance. These two are apparently the best of friends and it is stated in Momo's in-game profile that she treasures Sakura more than anything in the world.
Onikiri and his master Yorimitsu which turns out to be Mind Game Ship once you realize the truth about them, not helped by the rather suggestive PV art◊, as Onikiri's absolute devotion to his master opens a lot of possibilities. It's later confirmed that Yorimitsu had loved him in a way, but could not put this above his responsibilities, ultimately betraying Onikiri and causing his defection. Thus he is reduced to staring at the empty blade holder as if he had lost something important to him, mirroring Onikiri's habitual staring at his swords. May be considered pseudo-canon if only because Onikiri and Yorimitsu's concept artists/story creators obviously support this pairing as well.
Ōtengu and Shoyō, though it's not canonically confirmed that it really was Ōtengu who helped the latter out.
The frog shikigami are intended to be this, since they are both incredibly hard to acquire, and are completely worthless in combat.
Launcher of a Thousand Ships: Seimei himself. Period. Not only because he's the main character, but because he's a very kind Bishōnen who always tries to help people, very charismatic, a Chick Magnet, the fact that he is a Celibate Hero / Chaste Hero, and has no official canon Love Interest, leaves him very open to any possible pairings. Kagura, Yaobikuni, or Momiji being his most frequent ladies in fanworks, but it's not surprising to see him being paired with a lot of other characters in the series of any gender.
Moe: The grand prize goes to Shirodōji with his adorable looks and mannerisms, being a good and caring friend, bringing out the Mujō brothers' Hidden Depths and just being a lovely boy in general. His friend Kurodōji is a close second despite – or rather because of – his being a Creepy Child.
Scrappy Mechanic: Let's just say that the public announcement system when somebody manages to summon an SSR or SP shikigami isn't very well-appreciated. On a server-wide scale, it would seem harmless, and in theory it promotes the practice of complimenting your friends or guildmates if they manage to hit the 1% sweet spot that results in a rare shikigami being summoned, but in practice, it tends to have the opposite effect, especially if a player is particularly unlucky with the gacha. If you've spent all of your hard-earned jade and mystery amulets without gaining anything good out of the gacha, being flooded with torrents of notifications that your other friends were more lucky than you doesn't help, as instead of prompting you to compliment them, it feels like the game is deliberately rubbing salt into the wound instead. And as the cherry on top, these cannot be ignored either, as the game will incessantly pester you with the red notification on your menu bar that will not go away unless you open your inbox and read the messages yourself.
That One Boss: Known Game-Breaker characters, i.e Ibaraki-dōji and Susabi, are almost always nerfed in the story mode in order to help the player advance the story. The same cannot be said for Kuro Seimei, the final boss of chapter 18, to the point where there are entire forum threads dedicated to finding ways to defeat him.
That One Level: There are just too many to concisely list, so here are a few examples. They are mostly found in the secret skin dungeons, which are purposefully made to be as inhumanly hard as possible as the AI team cheats hard.
Shishio's secret 10 has you play Guess Who? with him and a bunch of his clones, but only hitting the real Shishio does anything, since attacking the copies instantly heals every one of them to full. This basically forces you to take single-target DPS shikigami as your main damage dealer. And should you manage to KO the real Shishio, the enemy lineup is replaced by an extremely tanky setup that spits in the face of the ST DPS that you brought. Worse yet, that second lineup has a Momo, who could just simply revive Shishio and the madness starts all over again.
Kingyo-hime's secret is just annoying to beat on level 10. Basically, you have to protect her while she takes the place of your onmyōji during the fights. Problem is, she's infuriatingly fragile, and will cause a mission failure if she dies. The AI being AI, they could just burst her down as soon as the battle begins and net you a game over, which they very well might. It wouldn't have been so bad otherwise, since with your own onmyōji you could manage the battle with their useful abilities. The other stages barely manage to avoid being here, since they're all rather simple to beat, before the meteoric difficulty spike takes round 10 right into this zone. And to top it off, the Bonus zone is simply round 10 but your Kingyo-hime is at base level and doesn't have any extra abilities, while the enemy boss does.
Higanbana's stage 10 is usually pleasant, until you reach the boss herself and realize that she could put up a shield to block all damage you deal for 1 turn. This may not sound very problematic in and of itself, but her flower field, on top of dealing high damage, also reduces your units' max HP by 30% of the damage dealt each tick, essentially putting a time/turn limit on your party until everybody dies from attrition. Normally, a high-leveled Chin and Onikiri could trivialize this fight, but the main issue is keeping them alive until the boss stage and beyond, as both are Glass Cannons, and the two battles immediately prior are very likely to put a huge dent in your party's health, making them all the more vulnerable to being one-shot by the flower field on the next turn, or Higanbana's own escorts should they survive. It's notably one of a very small handful of Secret maps that cannot be bruteforced by Orochi.
The story mode is infamous for its first Kuro Seimei battle, so much so that passing chapter 18 acquired minor memetic status.
That One Sidequest: One of the regularly recurring weekly/fortnightly events is "Daruma Wishes", which adds random drops of cards with three types of Daruma (Base, Grade and Skill) on them which you can collect sets of from various actions to trade for these Daruma. Of course, Base and Grade Daruma are common enough that the only one worth bothering with is the Skill Daruma (limited to 2 per event), but two extra Skill Daruma is quite a nice bonus. Trading for a Skill Daruma, however, costs 15 copies of each card. While you're guaranteed to get a Skill Daruma card every time you complete a bounty (easy) and Grade Daruma cards aren't that hard to get from Evo material zones (they can still be frustratingly rare, but Evo zones are pretty easy to clear in mere seconds), the drop rate for the Base Daruma cards (from Soul zones) is beyond abysmal. Exact numbers aren't known, but it's estimated the drop rate is as low as 1-5% per run, so it's perfectly possible to do 20-30 Soul zones and not get even a single card. And since you need 30 to get the permitted 2 Skill Darumas, this means obscene amounts of grinding, which isn't even guaranteed to pay off at all! A lot of players wish NetEase would just scrap the event and replace it with one that's not so needlessly infuriating.
Tier-Induced Scrappy: Onikiri, full stop. He is an intensely powerful and broken shikigami with a passive that lets him basically win matches with one hit, protection buffs be damned. Due to this, he's usually the one shikigami that you'll always use once you've summoned him, but at the same time he's also absolutely despised by those who have the misfortune of running into him in ranked matches without bringing another, extremely rare and specific SSR, along. See Game Breaker for more details.
Unexpected Character: Of the three shikigami from Hoozuki no Reitetsu appearing in the game, Houzuki went without saying and Oko was a fairly obvious choice, but pairing Peach Maki with Karashi as a single character was a very unexpected choice, as Maki is a character so minor she doesn't even have a character entry on either our character page or the manga's own wiki. Even more ironically, Maki and Karashi are considered the most-useful of the three in-game.