07th Expansion Wiki
This article is about a character in
Higurashi no Naku Koro ni Rei.

Kihiro Ryuugu (竜宮 希比呂 Ryūgū Kihiro) is one of the main protagonists of Higurashi no Naku Koro ni Rei. He is Rena Ryuugu's son.


Rena's son. He is in the same class as Keitarou, and they are especially close.

(Translated from the Hoshiwatashi website).


Kihiro has short orange hair and light blue eyes which he inherits from his mother marking his resemblance to her. His school uniform consists of a white button-up shirt and black pants.


Kihiro and rena

A young Kihiro and his mother

Kihiro is the son of Rena Ryuugu and an unnamed man. The family originally lived outside of Hinamizawa, however Rena and her husband divorced due to Rena being unable to overlook tiny things and believing them lies during arguments with her husband, causing Kihiro to develop a similar sense. Kihiro and Rena then moved back to Hinamizawa. But unlike Rena's parents who never reconciled after divorcing Kihiro's parents still love each other[1] and maintain a good relationship however, and Kihiro would even visits his dad sometimes.[2] Kihiro grew up with Keitarou as his best friend and now attends the Okinomiya middle school with his friends Tamaki and Sakiko, forming a games club.

Kihiro is suggested to be asexual, having dated a girl in the past but had no real interest in her and was dumped due to not doing romantic things with her. He later determined he's never had lustful feelings for anyone, and realized this with Keitarou's help.[1]


Kihiro is a calm and easy-going guy who appreciates having friends in his life but he's also sharp and intuitive. He has a habit of yelling that things are lies whenever he's pranked or tricked, but it usually takes him some time to register them. Kihiro will not hesitate to hit his friends if they do stupid things, inheriting his mother's extreme punches.

Kihiro tends to get flustered when around Keitarou and seems to refer to him with a cutesy nickname, calling him "Keitaro" in katakana (ケータロ). Kihiro loves Keitarou in the sense that a person loves a pet, and is grateful to him for helping him figure out his identity.[1]


Role in the Story[]

Higurashi no Naku Koro ni Rei[]


Oniokoshi ch1 kihiro punches sakiko

Kihiro punches Sakiko

Kihiro is introduced walking to his usual meetup spot with his friends when a hiding Keitarou surprises him from behind. They join Tamaki and Sakiko, and when Tamaki suddenly gropes Keitarou because of Sakiko's prompting, Kihiro punches Sakiko as punishment. The group then heads to school. After school, Kihiro notices that Keitarou and Kururu have developed a new friendship.

While the group heads home, Keitarou tells them about how he met a strange girl who wouldn't talk to him at all. Kihiro and the others tell him about Polaris, and how they're a cult that doesn't speak to outsiders. The group then goes to Smile Shop for dessert. Kihiro and Keitarou eat outside, where Kihiro expresses concern that Keitarou trying to get involved with Polaris would be bad. A photographer named Marutake then appears, a regular customer to Smile Shop. Marutake brings up Oyashiro-sama's curse, which seemed to resurface a year ago, but Kihiro says it's just a coincidence since the incident happened on Watanagashi last year. Marutake then brings up other incidents involving Polaris.

Oniokoshi ch3-3 kihiro analysis

Kihiro helps scare away the delinquents with his cold analysis

The club heads to Angel Mort the next day, where Keitarou declares he's going to become friends with Polaris and needs suggestions. The club focuses on eating instead. Later, they see some delinquents harassing a girl outside the restaurant. Keitarou tries to help her but gets knocked aside. Tamaki, Sakiko, and Kihiro help drive away the delinquents, with Kihiro deducing that the delinquent leader is lying about being a livestreamer just to pick up girls. Keitarou's friends then see that the girl being harassed was Inori, the strange girl Keitarou met earlier. Inori thanks them for their help and runs away, and then Kururu shows up. Keitarou introduces Kururu to everyone, and she quickly becomes friends with the club.

Keitarou chooses to induct Kururu as a club member, and so the club has a picnic with her the next day. During this, Kihiro observes Kururu and Keitarou's interactions. Kururu asks about all sorts of rumors surrounding Hinamizawa including Oyashiro-sama's curse, and Kihiro and Tamaki are quick to deny them. Keitarou then starts a club induction game of President. Keitarou allows Kururu to play a house rule, but Kihiro secretly looks it up later and finds the rule doesn't exist, realizing that Kururu lied. Kihiro decides to overlook it since Keitarou is happy.

Keitarou invites Kururu to join the club during the Watanagashi Festival and introduces him to all sorts of people. Kihiro however wishes that it could've just been the four of them hanging out, or even just him and Keitarou. The group then takes turns swinging the ritual hoe during the Watanagashi offertory dance. The day after the festival, Sakiko's father Kisaku goes missing and his aide is found dead. Keitarou worries about it while Kihiro consoles him and says the stress from moving back to Hinamizawa must be catching up to him. At school, Sakiko gets angry at a bunch of Polaris kids and blames them for kidnapping her father. Kihiro and his other friends try to calm her down. Later, Keitarou tells them that Polaris can't possibly be behind the incident and claims the real culprit is trying to pit Hinamizawa and Polaris against each other.

Oniokoshi 8-5 fire in the distance

Kihiro and Tamaki see Keitarou's house burning

Keitarou plans to hold a camping event to foster peace between Hinamizawa and Polaris. Kihiro tries convincing him to cancel it however, reminding him that Polaris forbids communication and that there's now a village mandate not to talk to Polaris. Keitarou gets angry since Kihiro was supportive of the idea earlier, and suggests that maybe he's the one trying to make Hinamizawa and Polaris fight. Kihiro is hurt by the accusation and asks to forget the conversation.

Kihiro attends the camping event and keeps texting Keitarou when he doesn't show up. He and Tamaki then see a fire coming from the direction of Keitarou's house. The next morning, the friends learn that Keitarou and several Polaris members died when they burned Keitarou's house down in a murder suicide. Polaris can't be held responsible for the incident since the perpetrators left the cult before committing it. Kihiro mourns the death of his friend.


Keitarou scares kihiro

Keitarou frightens Kihiro

Kihiro waits for Keitarou at their usual spot and then join Tamaki and Sakiko. When Tamaki suddenly gropes Keitarou because of Sakiko, Kihiro punches Sakiko in the face as punishment.

After school, Kihiro watches as Keitarou makes a new friendship with Kururu. The group reunites, and Kihiro's tone turns serious as he tells Keitarou that they need to talk about the children in Hinamizawa. The club explains that the village changed because of Polaris appearing.

Hoshiwatashi ch2 keitarou and kihiro

Keitarou and Kihiro talk

The club goes to Smile Shop the next day. Keitarou and Kihiro eat and talk outside, where Kihiro mentions that Oyashiro-sama's curse seemed to resurface last year, and that the one who disappeared was a Polaris member. Kihiro tells Keitarou to stay away from Polaris, but he shows confusion as to why everyone dislikes them. Sakiko suddenly appears and explains why.

Keitarou is still determined to befriend Polaris, and at school he tells his friends about a plan to give members questionairres. They then meet Kururu and learn she's a Polaris member, but become friends when she proves very talkative. The next day, Keitarou tells his friends about his interest in inviting Polaris kids to the Watanagashi, but Kihiro and Tamaki are the only ones to show support.

Kururu and Inori invite Keitarou to the Polaris festival, and he relays this fact to his friends the next day. Kihiro, Tamaki, and Sakiko show extreme disappointment, with Sakiko getting especially angry at Keitarou for breaking his promise and trusting Polaris. Sakiko storms off, and Tamaki and Kihiro follow her to calm her down.

Hoshiwatashi ch6 villagers and the club

A crowd of villagers ask the club about Keitarou not attending the festival

Kihiro, Tamaki, and Sakiko attend the Watanagashi Festival without Keitarou. Some of their parents ask where Keitarou is, and before any can explain, someone in the festival crowd shouts that Keitarou went to the Polaris festival. Word begins spreading around the festival, and a crowd of villagers soon approach Kihiro and his friends about it.

After the festival, Kihiro tries calling Keitarou but gets no response. The friends show concern for the villagers inquiring about Keitarou's absence. Keitarou later replies to Kihiro with a text saying they'll talk tomorrow. That never happens however, as Keitarou is killed when a mob of Hinamizawans invade the Polaris settlement and kill everyone there, blaming them for the death of Rika and the disappearance of Kisaku. Kihiro gathers with his friends and family afterwards.


It's shown that in Oniokoshi's world, after Keitarou's house burned down, Kihiro called Rika with concerns over Keitarou acting weird and developing a single-minded interest in getting along with Polaris while scratching his head often.

Kihiro watches over Kururu and Keitarou getting along well and confronts Kururu alone after school to tell her to stay away from him. Kururu, secretly keeping tabs on the club members and worrying that Kihiro's found her out, plays dumb and asks if Kihiro is just jealous and actually loves Keitarou. Kihiro explains that he does love Keitarou but not in that way, and talks about how grateful he is to Keitarou for helping him come to terms with his identity.



  • Kihiro's surname was left unknown during the initial announcement of Higurashi Rei.
  • Natsumi Kei's design for Kihiro was inspired by pictures of a young Björn Andrésen.[3]