Ema Asahina(朝日奈 絵麻 Asahina Ema?)
Voiced by: Rina Satō (Japanese); Colleen Clinkenbeard (English)
The daughter of the well-known adventurer, Rintaro Hinata. She is 17 years old and in her second year of high school. After her father remarries, she moves in with her 13 new stepbrothers. She is very good at cooking. Her father's job had always left Ema feeling alone, but now, with her new family, she feels happy and safe. She has a talking pet squirrel named Juli who is always saying that her new family is a pack of wolves and that she must always be well aware of her surroundings. Juli can only communicate with Ema and (as it is later revealed) Louis. Both Juli and Louis call Ema "Chi". It is later revealed that Ema is adopted as her real parents had died. At first this revelation causes a problem for Ema because her so-called father had kept the fact that she was an orphan from her for so many years. However, Louis helps her through this by sharing his own experience. Juli also reassures her of her father's love.
Masaomi Asahina(朝日奈 雅臣 Asahina Masaomi?)
Voiced by: Kazuyuki Okitsu (Japanese); J. Michael Tatum (English)
The first and oldest son of the Asahina family, aged 31. He is a doctor who is well versed in medicine. However, he is not as competent as he seems because he faints at the sight of blood. He loves children and shares a special bond with the youngest brother, Wataru.
Ukyo Asahina(朝日奈 右京 Asahina Ukyō?)
Voiced by: Daisuke Hirakawa (Japanese); Christopher R. Sabat (English)
The second son of the Asahina family aged, 28. He is a successful lawyer and acts as the "mother figure" to the family. He cooks, cleans and helps the others study for school. He has a calm and reliable personality but can also be very talkative.
Kaname Asahina(朝日奈 要 Asahina Kaname?)
Voiced by: Junichi Suwabe (Japanese); Ian Sinclair (English)
The third son of the Asahina family, aged 27. He has the charms of a playboy, and a womanizing nature, but is actually a monk.
Hikaru Asahina(朝日奈 光 Asahina Hikaru?)
Voiced by: Nobuhiko Okamoto (Japanese); Todd Haberkorn (English)
The fourth son of the Asahina family, aged 26. He is a cross-dressing novelist who likes watching his brothers' reactions around Ema. He had gone to Italy for a short time to gather material for his work. Hikaru seems to know that almost every one of his brothers has feelings toward Ema, and even makes a chart called "Brothers Conflict" as his hobby.
Tsubaki Asahina(朝日奈 椿 Asahina Tsubaki?)
Voiced by: Kenichi Suzumura (Japanese); Micah Solusod (English)
The fifth son of the Asahina family and one of the triplets, aged 24. He is a voice actor alongside his identical triplet brother Azusa. He is cheeky and pushy, but is hard-working and is passionate about his career. In episode 4, Tsubaki kisses Ema when he is depressed. He kisses her again in episode 6, as well as revealing his feelings for her. He cares a lot for Azusa.
Azusa Asahina(朝日奈 梓 Asahina Azusa?)
Voiced by: Kōsuke Toriumi (Japanese); Josh Grelle (English)
The sixth son of the Asahina family and one of the triplets, aged 24. Like his identical triplet brother Tsubaki, he is a voice actor. However, he is calmer and less tenacious than Tsubaki and is usually the one to keep Tsubaki in check. In episode 8, after realizing his feelings for Ema, he confesses to her.
Natsume Asahina(朝日奈 棗 Asahina Natsume?)
Voiced by: Tomoaki Maeno (Japanese); Kyle Hebert (English)
The seventh son of the Asahina family and one of the triplets, aged 24. Unlike Tsubaki and Azusa, he is a fraternal triplet. He is the CEO of a video game company that makes one of Ema's favorite video games - "Zombie Hazard". Unlike the rest of the brothers, he lives alone. He has a blunt way of talking but is very good at looking after others. It is revealed in episode 9 that he has feelings for Ema. He has two cats named after his brothers, Tsubaki and Azusa.
Louis Asahina(朝日奈 琉生 Asahina Rui?)
Voiced by: Ken Takeuchi (Japanese); Jerry Jewell (English)
The eighth son of the Asahina family, aged 21. He works as a hairdresser. He is a beautiful and a mysterious man, always looking up at the clouds. He is the only other person besides Ema who can communicate with Juli, and promises him that they will protect Ema. It is later revealed in the game and anime that he is adopted, and he is the one who helps Ema after she also finds out that she is adopted.
Subaru Asahina(朝日奈 昴 Asahina Subaru?)
Voiced by: Daisuke Ono (Japanese); David Matranga (English)
The ninth son of the Asahina family who turned 20 in episode 2. He is a college sophomore and is very athletic, and plays on the basketball team. He has no understanding of girls and doesn't know how to deal with them. As a result, he gets tense around Ema. He asks Ema out in episode 5.
Iori Asahina(朝日奈 祈織 Asahina Iori?)
Voiced by: Daisuke Namikawa (Japanese); Eric Vale (English)
The tenth son of the Asahina family, aged 18. He is a high school senior and is known for showing prince-like behavior. He is very popular and is even well-known in other high schools. He is very accepting of Ema when she comes into the family. Iori has knowledge of all types of flowers and their meaning. He often gives Ema flowers relating to her current situation to help her feel better. In the game, he has a girlfriend named Fuyuka, whom he loves very much. Unfortunately, Fuyuka dies in a car accident, making Iori suicidal. Iori tries to kill Kaname for trying to prevent him from killing himself, but Ema is able to prevent this.
Yusuke Asahina(朝日奈 侑介 Asahina Yūsuke?)
Voiced by:Yoshimasa Hosoya (Japanese); Matthew Mercer (English)
The eleventh son of the Asahina family, aged 16. He is a second-year high school student and also Ema's classmate. He has a righteous personality and hates anything to be incorrect. He is also a delinquent. It is revealed in episode 2 that he had a crush on Ema at school, before she became his sister. He was very confused when she came into the family.
Futo Asahina(朝日奈 風斗 Asahina Fūto?)
Voiced by: KENN (Japanese) Vic Mignogna (English)
The twelfth son of the Asahina family, aged 15. He is a first year high school student and a very popular idol. He has a devilish and cheeky personality. However, he can be very mature for his age. In episode 6, he transfers to Hinode High School, which shocks Ema and Yusuke. He loves to tease Ema about being his "beautiful idiot sister". He later develops romantic feelings toward Ema.
Wataru Asahina(朝日奈 弥 Asahina Wataru?)
Voiced by: Yūki Kaji (Japanese); Bryce Papenbrook (English)
The thirteenth and youngest son of the Asahina family, aged 10. He is in the 5th grade. He is sweet and honest, but very spoiled. His sometimes spoiled behavior may be due to the over-protection of his older brothers.