- NOTE: This article is about the incarnation of Oyashiro-sama as presented in the sequel series for Higurashi. For the overall iteration, that version can be found here.
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Eua, also known as Oyashiro-sama, is the overarching antagonist of the stealth sequel series Higurashi: When They Cry Gou. A being of unknown origin, she was the one who granted Satoko Hojo her ability to traverse through loops, and is the one that Satoko believes to be the miko (shrine maiden) of.
She is voiced by Noriko Hidaka in the Japanese version, and Emily Fajardo in the English version.
Eua speaks in a condescending tone of voice with a hint of mockery. Instead of introducing herself to Satoko, or at the least allowing Satoko to get a word in, Eua refers to her as "Mitsuyo", "Vier" (a character existing in another When They Cry work), and then "Anomalous Spinal Cord Specimen LD3105". From the way that she speaks, Eua appears to have infinite knowledge on the nature of loops thus meaning she is omniscient to some degree.
She also comes across as easily bored and needing to be stimulated. As such, she sadistically takes enjoyment out of Satoko's suffering and her deeds in each loop stating that she had yet to tire. For whatever unknown reason, she also seems to have some resentment towards Rika, or the "cat" as she referred her, for unknown reasons.
When Satoko and Rika returned to Hinamizawa in 1988 to attend a club reunion, Satoko decides to take a walk around the village for memory's sake. As she approached the old ritual warehouse, she hears a strange sound and goes inside. When she gazes at the statue of the village deity Oyashiro-sama, a horn-like object emerges from it. Curious, Satoko touches it and is taken to the Sea of Fragments.
Upon arriving, the horned godlike being taking the name "Oyashiro-sama" greets her seemingly confusing her for an old friend of hers. Apparently foreseeing all the chaos that Satoko would wrought, she informs her that she was already aware of her wish of going back in time and decides to grant her the ability to loop regardless of whether Satoko accepted the powers or not. She tells her that this would not come without a cost stating that Satoko's attempts at keeping her entertained were more than enough to satiate her. She also explains to Satoko that in order for her powers to work, she would have to die. Ignoring Satoko's panicking, she sends her back to June 1983 shortly after the defeat of Takano.
When Satoko realized that she was truly back in the past, she attempts to sabotage Rika to prevent the events that led to her falling out with her best friend. However despite her efforts, the events play out the same thus leading to Satoko killing herself and Rika with the falling chandelier thus sending Rika back to the Sea of Fragments.
In episode 23, Satoko explains how whenever she used her looping abilities, a few of the characters, like Keiichi or Shion, started to remember events from other fragments which led to her killing them in order to cover her tracks. According to Oyashiro-sama, the reason had to do with Rika's accumulated influences over the fragments. Satoko also points out to her that they had been conspiring for a while now and that she never revealed her name to her. Oyashiro-sama insists that she truly had no name, but she would allow Satoko to give her a nickname for convenience's sake. Satoko tries to think of a name to which Oyashiro-sama comedically latches onto "Eua" due to the strand of stuttering Satoko was making.
- Many When They Cry fans came to the unanimous conclusion that "Oyashiro-sama" was none other than Featherine Augustus Aurora, the Witch of Theatergoing, a witch from the Umineko series who was arguably the most powerful entity in the franchise. A great portion of this came from the similarity of the character designs such as "Oyashiro-sama's" horns resembling Featherine's memory device. However, both characters have different voice actresses and Ryukishi07 himself had confirmed in a livestream that while the similarities were intentional, "Oyashiro-sama's" name was not the same as Featherine's. On the flip side, he did not comment on whether they were the same character.
- When talking with Satoko, "Oyashiro-sama" at first refers to Satoko as "Vier" and as "LD3105." Vier is an allusion to the visual novel Ciconia: When They Cry where a character named Vier Dreissig has a striking resemblance to Miyo Takano. LD had also been implicated to be a reference to Lambdadelta, another character from the Umineko series.
- There is a running theory that Eua is actually the corrupted version of Hanyuu. Due to the fractures on her horns healing over time, it can be assumed that Hanyuu transformed into Eua.