Mion Sonozaki and Rena Ruuguu

Rena Ryuugu has short orange hair in an asymmetrical bob with longer locks in the front and spiky bangs. She has light blue eyes. Her school uniform consists of a sailor uniform with a white blouse and blue collar and a matching pleated skirt. She wears it with a yellow scarf, white socks and dark shoes. Her casual outfit is a white A-line midi dress with a turtle neck, puffed sleeves and a long slit down the center. The dress is adorned with purple bows, one at her collar and a larger one at the back. She pairs it with a white beret, black thigh highs and long brown lace boots. On the outside, Rena Ryuugu is a friendly, earnest, and caring young girl, if a little strange and goofy. She has a habit of saying "hau" and "kana, kana?" which in the latter's case is meaning her repeating the last words that she said. Whenever Rena sees something "kyute", she'll enter "Kyute Mode" and often loudly exclaim that she'll take them home (Omochikaeri), whether they are objects or people. Rena loves cooking and often makes many delicious meals for her friends. Rena owns a pet hamster. Despite her silliness, Rena sometimes shows great intuition and responsibility, displaying a terrifyingly perceptive side of herself that can read people and situations to their very core at a glance. Rena is also aware of how often she goes into Kyute Mode and will use this to her advantage at times. Rena shows hints of depression and sadness, given the circumstances surrounding her parents divorce. Sometimes she will say her own catchphrases to herself to cheer herself up. Rena also has a secret base in the junkyard formed out of a wrecked van that she will go to for peace and quiet. Rena feels a strong attachment to the junk she brings home, thinking of them as abandoned and needing a place to live. Whenever Oyashiro-sama is mentioned, Rena's personality changes such that she insists that he is real and becomes fiercely defensive. She truly believes in the god's existence and is thankful to him for many things. Rena also has an intense hatred for lies, often lashing out violently when being lied to. Rena originally was called Reina Ryuugu, being born and raised in Hinamizawa. Her family lived in her grandmother's house for a few years and moved to Ibaraki for her mother's work. Reina started learning how to cook to help her father, and her mother regularly took her out to eat at fancy restaurants and parties. Reina and her mother also always hung out with a man Reina called "Uncle Akihito". One day, Reina's mother told her that she was planning on divorcing her father and marrying Akihito. The young Reina opposed it, but her mother said she was already pregnant. When her parents divorced, Reina's father received a lot of settlement money. Reina wanted nothing to do with her mother or Akihito and started throwing out everything related to her like pictures and furniture. Reina also started to hate her own name. Reina's mental state deteriorated because of the divorce, to the point where she went on a rampage destroying windows in her school and attacked three students, permanently blinding one of them in one eye. Despite this, the victims nor the school took legal action against Reina. Reina was submitted for psychiatric evaluation. She claimed to hear Oyashiro-sama telling her to return to Hinamizawa, believing she was cursed for leaving the village in the first place. During her stay in Ibaraki, Rena started to experience the sensation of maggots crawling around in her skin and resorted to self-harm, thinking she was getting rid of them. The reason to this was that Rena developed terminal symptoms of Hinamizawa Syndrome because of her stress. Deity briefly intervened, giving her the message to return to Hinamizawa. Her father agreed with her daughter's request and moved with her back to Hinamizawa. Reina's mental state improved, and she started calling herself "Rena" since wanted to remove the "i" from it, the "icky" things from her life. Rena then became a member of the Hinamizawa after-school games club. Mion is friends with Rena as leader of the club. Sometimes Mion will get rough with Rena when she goes on tangents about Oyashiro-sama.

Mion Sonozaki is the president of the Hinamizawa after-school games club, Shion Sonozaki's twin sister, as well as the current heir to the Sonozaki family. Mion is a tall teenage girl with teal eyes. Her hair is long and light-green in color, with bangs parted at the center of her face. While she normally ties her hair in a ponytail, she can also let it down on occasion, allowing her to pass as her twin sister Shion. She also has a tattoo of a demon on her back, which she hides from everyone. Mion's school uniform outfit consists of a white short-sleeved shirt with pink stripes on her collar and the ends of her sleeves, as well as a long pink pleated skirt. Her shirt is covered by a yellow vest and the uniform is completed with a red tie. Mion's casual outfit consists of a yellow t-shirt with a black turtleneck and blue jeans, along with a white sweater tied around her waist. Mion has a confident and outgoing personality, allowing her to naturally fulfill her roles as class representative and leader of the club. She is a sociable person who is well liked and respected by other students at the school, as well as the villagers of Hinamizawa in general. Mion is an avid collector of board and card games, and bases her school club around them. She is fiercely competitive during these club activities and revels in taunting her opponents when she is winning. The rules of their club permit members to use underhanded methods to gain victory, and Mion takes full advantage of this rule both by directly cheating as well as preparing resources beforehand. While she has a competitive streak during games, this has very little transference to her day-to-day life, where she tends to take a more laid back approach to issues such as studying. Mion has a tendency to make dirty jokes. This trait of Mion extends to her choice of penalty games for the club activities, which regularly involve getting other members to wear various fetish outfits that she has amassed in her club locker along with her games. Mion can be described as "acting like an old man sometimes", and she also frequently uses that phrase in referring to herself as "this old man". Despite Mion's tomboyish disposition, she also has a more feminine side. Mion is "on the fence as to whether she wants to be a boy or a girl". Mion gets easily flustered when it comes to issues around her romantic interest, a stark departure from how she usually acts. Unlike Shion, she is bad at lying about her feelings. Mion cares deeply for her friends and has a strong sense of justice. She challenged and interrogated her grandmother due to her belief in the injustice of Satoshi's disappearance. Her more mature outlook leads her to take practical considerations into account, which helps her to avoid making rash decisions but can also lead to her feeling helpless to challenge existing systems. Mion is more stable than the other club members, and as such has never herself succumbed to Hinamizawa Syndrome. While Mion is acting in her capacity as successor to the Sonozaki family, she takes on a more authoritative disposition and can put aside her personal feelings in order to coldly carry out her duties. Though, she only takes this role, when she deals with some official personas, or during official meetings. With friends, she usually acts casually. This is traditionally believed to be the result of a "demon" living in each Sonozaki successor. While she puts on this front publicly, she also feels a great amount of guilt. Mion and Shion were born as twins to Akane Sonozaki and her husband. According to the family traditions, one of the two twins was supposed to be strangled at birth in order to prevent disputes over the succession, but while their grandmother Oryou was rumored to have tried to do so, she for an unknown reason did not carry it out. As such, the two twins grew up together and frequently swapped places, delighting in the inability of adults to tell them apart. It is revealed that Mion was born under the name "Shion Sonozaki", but had swapped places with her sister on the day that the heir was to be given the demon tattoo, and as such permanently assumed the role of "Mion Sonozaki". She denied knowing about the tattoo arrangement beforehand. Mion was raised from childhood by Oryou as the successor to the Sonozaki family. While the succession would normally go to her mother Akane, she was disqualified from the role due to a disagreement with Oryou over her marriage to a yakuza member. As such, she would sit alongside Oryou in village council meetings as a child in order to learn her future role, as would sometimes even address the council in her official authority herself. Despite being a child at the time, Mion was an active member of the Onigafuchi Guardians, which led the protests against the Hinamizawa Dam Project. She would frequently get involved in violent altercations with the dam construction workers, to the point of throwing bricks at people. As such, she often found herself in trouble with the police. Mion formed the after-school games club at some point. She used to be really bad at the games and would frequently have to take the penalties herself, but over time started to engage in dirtier strategies to secure her victories. Now, Mion is the oldest student at the Hinamizawa school, and thus serves as the class representative. She also helps out at her uncles' stores on an irregular basis depending on their need for manpower. As heir to the Sonozaki family, Mion has a sizable personal allowance and access to a large amount of resources and information. She however is limited by her position and the Sonozaki family's history, and thus cannot use this for personal goals that run contrary to the family's reputation. Mion also has the authority to speak in Oryou's place at village council meetings. Mion is Shion's older twin sister. Although Mion is the successor to the family, she still cares for Shion and was happy to communicate with her when the latter escaped from St. Lucia. Oryou has revealed many secrets to Mion, such as that the Sonozakis are not actually behind the curse. Shion is one of the few people who Mion confides personal issues to.