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12
TV
Finished Airing
Jan 8, 2026 to Mar 26, 2026
It is common knowledge that nobles will do anything for power; lying, manipulation, and extortion are the usual tactics. However, one family is exempt from this generalization: House Grail, whose main tenets are truth and integrity. The youngest daughter, Constance Grail, is just as moral as the rest of her family, believing in always doing the right thing and helping those in need. However, these ideals do not help her when her fiancĆ© cheats on her with another woman. Framed by his lover in the hope of her downfall, Constance has no one to hear her pleas for justice. Everyone turns a blind eye, save for oneāthe spirit of the infamous Scarlett Castielāwho possesses Constance and turns the tables on her accuser. However, this aid does not come without a price. Ten years ago, Scarlett was executed for the attempted murder of Princess Cecilia. But this was actually a setup; as blunt and harsh as Scarlett could be, she would never stoop so low as to use poison. She has no idea who orchestrated her incrimination, but Scarlett demands that Constanceāas the only one who can see herāhelp her exact revenge on all those who wronged her! [Written by MAL Rewrite]
7.2/10
Average Review Score
46%
Recommend It
13
Reviews Worldwide
I love this show, but Holy Grail of Eris has the rare distinction of suffering from a case of excessive world building. Iām all for fleshing out the world, characters and establishing mystery, but my God, if I need a damn flowchart to understand the show itās probably gone too far. At one point, Scarlet literally makes a remark about how things have gotten too confusing to keep up with and itās so funny because itās a meta statement that perfectly sums up how everyone watching this show felt. Donāt get me wrong, Scarlet and Connie are one of the best duos of the seasonand I did enjoy the journey to solve the mystery behind Scarletās death, but I couldāve done with a little less lore dropping. Still, I think this is one of the better recent villainess shows. This has basically become the female equivalent of the isekai power fantasy set up or the banished from the heroās party trope, but Iāll keep watching as many of these as they make. The distinguishing trait of Eris no Seihai is of course Scarlet and Constanceās unique relationship. Scarlet guiding Constance from beyond the grave and enlisting her help to solve her own murder isnāt something Iāve seen done before. They basically have a bad cop good cop dynamic going on and while Scarlet is definitely the older sister figure, after about the halfway point sheās the one being taught by Constance. Constance starts off as a weak timid low ranking noble whoās afraid to even stand up for herself and by the end of the show, sheās willing to stare down execution without blinking, facing off against criminal syndicates and generally being a much more assertive character who even moves scarlet consistently. It didnāt even dawn to me initially, put thereās a plot mechanic where Scarlet can take control of Constanceās body to help her through difficult situations and as the show goes on, it just happens less and less because Scarlet rubs off on Constance so much that sheās naturally able to deal with those situations on her own. Itās done so organically that I didnāt even realize until the end of the season that it had be several weeks since the last time it was done. I love when a characterās development is tangible and believable. Itās not just Constance, though. Even Scarlet gets a nice amount of development from beyond the grave and while she comes off as this pompous genius, we see the cracks in her armor and learn how thatās all just a facades a defensive mechanism to cope with all the pressure sheās had to deal with from the time she was a child. Both leads are very well written and likeable! Also a fan of how this series tackled some really dark and messed up topics like human trafficking, drug use, sexual assault etc., it didnāt shy away from the sort of things you could expect to see in a world with corrupt nobles which is refreshing. The supporting characters are where things kind of get messy. Theyāre all fairly well written, thereās just too many of them to keep up with and they all have these entangling alliances that feel like Iām learning about how WW1 started rather than watching an anime. Again, respect to the author for trying to make the world feel alive and lived in, but man this was a lot, especially the last 4-5 episodes when all the conspiracy and secret organization stuff started getting laid on thick. Cool ideas, but maybe a little less info dumping? Iām still kind of on the fence with the romance here. At first I hated it because Rudolph and Connie seemingly had no chemistry or anything in common, not to mention heās quite a bit older than she is, Iām not quite sure of the ages because I havenāt read the books yet, but thereās a noticeable gap. However, it is an otome romance so youāll always have some problematic elements. Generally, I think their relationship gets some solid development and by the end I was kind of .. rooting for them ngl. I think their relationship gets way Constance becomes someone Rudolph can lean on and he doesnāt have to always be the person coming to save her anymore is really sweet. Big fan of strong guys breaking down and showing the delicate soft girl character their weaknesses. Itās a relatively minor part of the story, the murder mystery and conspiracy stuff is way bigger so not a big deal either way. The production values are .. rough. The 2D art is good, but any extended action animation looks bad and tbh even some of the regular more laid back episodes looked rough. Itās an otome fantasy, so it doesnāt need the best quality, but still I wouldāve liked a little better than this. The voice acting is amazing though. If you can stomach the subpar production values, I think holy grail of Eris is one of the better recent villainess series and certainly has one of the best stories. Convoluted, but a lot of thought went into this and it kept me engaged each week. Constance and Scarlet are also one of the best duos around, Iāll certainly miss scarlet on my screen each week! The holy Grail of Eris gets 8 out of 10
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The Verdict: A Mixed Bag of Visuals and Choppy Writing ā The Plot: A "Budget" Hack Job The story suffers from what can only be described as a loathsome "plot chop." The pacing feels rushed and disjointed, likely due to budget constraints or poor adaptation choices. It lacks the depth youād expect from a solid series; honestly, if this had been a Chinese (CN) production, the execution likely would have been far more polished. ā The Art: The Main Attraction The art is the clear standout here. The character designs are specifically featuring a well-defined BBWC (big boobs with cleavage) aesthetic that doesn't miss. If you are here for thevisuals, the artist delivers, even if the writers didn't. ā Who is this for? ā The Target: This seems geared toward the "people at work" demographic looking for a quick, visually-driven distraction. ā The "Desire" Crowd: Anyone primarily motivated by the specific art style and character designs will likely enjoy this to the max. ā Who should skip it? If you are looking for a cohesive story featuring a villainess counterattack, genuine female friendship, and a strict no-romance (No CP) plot, this is a hard pass. Despite having the individual elements, it fails to weave them into a satisfying narrative. ā Bottom Line: Itās a series of "what ifs." BBWC trapped in a chopped-up story.
"You have this series at a low rating, yet you recommend it to people?" Allow me to explain. Usually, I open my review with a goofy or fun opening, especially since this anime was about possession. But for this anime, I can't. I highly recommend reading either the Light Novel or the manga. The pacing in the OG material was much better than the anime. Even so, the anime still captures the bare minimum of the series. A pathway to the great content. Basically, it's a way to enter the real deal. Anyway, let's start the review.How did I find this? I search for a story about possession that isn't an H. Yeah, I know it's almost impossible these days and ages. Yet, I found it! I'm not gonna tell you where I found the thread talking about this series, but I can tell you that this series is in MangaUP! Appealing (Why did I get into the anime?) POSSESSION! I think at this point, you know how I feel about a ghost story. They are a very interesting story to me, and I crave more. Platform Aniplus Asia (Southeast Asia), Aniplus TV (South Korea), Bahamut Anime Crazy (Taiwan), Bilibili Global (South Asia & Southeast Asia), and Crunchyroll. The review; Plot/Story It's a revenge story where the woman who does the revenge was killed in the first minutes of the episode and came back as a ghost 10 years after she was killed. How? By binding her spirit to a seven-year-old girl. Then, ten years later, the girl was bound by the ghost, Scarlett Castiel. The story began when the MC, Constance Grail (Connie), agreed to help Scarlett with her revenge. But here is the thing, though, I've read eight chapters of the manga. It has a lot of movement. The story didn't just focus on the revenge. The villain was planning, a third party was also involved, and not only that, even the people who died over the past ten years also got involved. Basically, it was a complicated masterpiece. Too bad the anime butchered the story because of the pacing. Let me tell you that eight chapters of the manga (which, by the way, were about 50 to 60 pages long) were squished into THREE EPISODES. Yes! It's that bad. I wouldn't complain if one chapter were only twenty pages long. But 50 per chapter? Yeah, you've done badly. Character I would have talked about the characters, but I just have to be honest, it's hard, even for a manga reader like me, to justify the characters' development. The pacing was so fast. The only great thing about these characters is their overall design. OST/SFX The OP and ED were a masterpiece, definitely one of my favorites of this season. Animation It was watchable. It's not that bad, but it's not that great either. I have never seen any Ashi Productions anime, but by the looks of things, they don't have many anime in their catalog that were popular. It's great to see one of them. It's just too bad that I witnessed one of their worst-paced anime. VA They are all great, especially Scarlett. Being a vengeance ghost, Scarlett was fantastic. Thank you for your performance, Sayumi-san. I appreciate it. Bonus segment I make this section to talk about pacing! Let me be clear. I recommend this anime not because it was a good anime, but because it was a good way to easily get into the manga or light novel. The story in the anime captures a small amount of detail in the grand scale of the source material. It can get you invested in the world of HoGeRis. The conclusion; Enjoyable I did enjoy it. It's just sad that the pacing was bad. Worthable YES! I watch this weekly. And I bet you can watch it bingely. Delivery It was alright. Not the best anime of this season, but I can say it was a pretty great watch. OG Sauce Definitely a must-read. After you invest in the world of HoGeRis, please read the manga or the LN from the beginning. It was a great read. It is also a great way to understand what happened in the anime. Overall 6.4/10 I would still recommend this to people who are curious about the story in a gist. I highly recommend reading the source material, though.
Pretty big disappointment for me. When it started out I absolutely loved it with the potential to be best of the season for me, but it got worse and worse over time. The plot got too convoluted. No more verbal beat downs by Scarlett, she just served as a deus ex machina to get the mc out of the stupid shit she constantly got herself into. And the promised revenge didn't feel like revenge at all with the perpetrators going completely scot-free or getting killed by third parties without the mc involvement. By the end I didn't care about any of them anymore, lots ofwasted potential. The other thing which is absolutely dogshit is forced relationship . The whole story isn't about revenge it's just a collection of tragic moments .
I watched this pretty much on autopilot, but the story never made much sense and they kept adding more characters and plot lines which I constantly felt like I wasn't following. By the time a character's scene would end was when I remembered vaguely who the character was. OP song had a pretty nice start, but overall wasn't memorable enough to put in any playlist. Art was decent, I don't recall any scene where I could judge the animation, mostly static conversation scenes. If there was animation, it was probably average considering I don't remember anything about it. Characters were pretty boring. Noone seemed to have a reasonablemotive for any of their actions except maybe the villains and Scarlet's Dad.