Tropes applied to both Ichika and Futaba
- Big Bad : In their bad route, either Ichika or Futaba becomes this due to their obsession for the other growing so high, which leads them to become evil and dangerous.
- Even Evil Has Loved Ones : In both bad route, no matter how horrible Ichika or Futaba become, they still love the other.
- Foolish Sibling, Responsible Sibling: Both sisters are opposed in personality. Ichika serves as the mature and responsible one while Futaba is more immature and is too dependant of Ichika.
- Psycho Lesbian : Both are this in their bad route, albeit in a different way:
- Futaba not accepting her sister's rejection tries many times to convince her to accept her love. Going as far as raping her, delusionally thinking that she will change her mind. All of Ichika's refusal leads to Futaba killing her.
- Ichika not accepting the fact that Futaba is close to other people than her would abuse her sexually to make her understand that she is the only one Futaba needs. She has also no problem killing those who gets in her way such as her parents or her best friends.
- Twincest : Both sisters are in love with each others.
Ichika Sakura
Ichika is the older twin of the family and is very close to her sister Futaba. She is calm, reliable and independant, the opposate of her sister. Because of the time they spent together. Ichika falled in love with Futaba, but due to thinking their love was wrong as well as being asked by her mother to let Futaba be more independant, Ichika would try to put some distances with her.
- Bad Liar: Despite telling Futaba that they cannot be together, she cannot hide the fact that she loves her, something than Futaba can see easily.
- Cool Big Sis: Ichika is always ready to answer Futaba's demands no matter how childish these demands can be. While she loses this aspect for a time because her mother asked her to, she recovers it when she realizes she really loves Futaba and wants her hapiness.
- Hair of Gold, Heart of Gold: Ichika is blonde and she is a nice and caring person, especially with Futaba.
- Heel Realization: She realizes it was a mistake to listen to her mother and try to put distance between her and Futaba.
Futaba Sakura
Futaba is the younger twin of the family and is very close to her sister Ichika. She is cheerful,honest and immature, the opposate of her sister. Because of the time they spent together. Futaba falled in love with Ichika, and despite being asked by her mother to be more independant as well as Ichika trying to put some distance between them, Futaba would not listen always go after Ichika.
- Attention Whore: She is almost always asking for Ichika's attention.
- Genki Girl: Futaba is often energetic as seen when she practise tennis and when she runs after Ichika.
- Getting Sick Deliberately: Futaba tries to starve herself in hope to get sick so that Ichika would be worried about her and come back to her.
- Girlish Pigtails: Futaba usually wears her hair in pigtails.
- Manchild : She often acts as a child with Ichika, such as asking her to eat the aliment she doesn't like or asking to hug her or sleep with her.
Yuri Mikage
Yuri is a Childhood Friend of Ichika and Futaba and a classmate of Ichika. She is an carefree girl, a member of the litterature club and an otaku. She is also popular among her underclassmen.
- Deuteragonist : Alongside Saki, she is the most prominent character of the story after after Ichika and Futaba.
- Even the Girls Want Her : She is popular among her underclassmen in a all girls' school. Popularity that she enjoys.
Saki Kohinata
Saki is a Childhood Friend of Ichika and Futaba and a classmate of Futaba. She is mature, kind and deeply caring of her friends. She is in the Tennis Club like Futaba
- Deuteragonist : Alongside Yuri, she is the most prominent character of the story after Ichika and Futaba.
- The Watcher : When Ichika isn't around, she is the one who looks after Futaba and sometimes gives her advice to help her to get closer to her sister.
Twin's mother
She is the mother of Ichika and Futaba. While she is happy to see the two of them get along well, she becomes afraid that the two become too close and that Futaba would not be independant if this keeps up. This leads her to ask the two of them to put some distance.
- Antagonist Title : The title explicitly tells that she must not find out about the sisters relationship.
- Big Bad : She is this for the majority of the game as her actions lead to Ichika trying to avoid Futaba which cause both of them to emotionaly suffer from it.
- Good Parents : Despite trying to separate her daughters, she is only doing that because she thinks it's for their good. She is still a loving and caring mother to them.
- The Heavy : While many characters are suspicious of the twin's relationship. She is the one who actually acts by trying to put distances between them.
- Heel Realization: In the good routes, she would realize that it was a mistake to split both sisters as they are better when they are together. Though she is unaware that they are in a relationship.
