The 7 Seeds manga series created by Yumi Tamura features a varied cast of diverse characters, each in different teams. There is no set main character. Instead, the story switches perspectives between each teams and different characters.

Every member of a team has a name containing a kigo, a poetic seasonal word, related to the team name – for example, all of the members of the Spring team have names traditionally associated with spring. Each team consists of seven members plus a guide trained in wilderness survival.

Teams There are currently five teams living in the world of 7 Seeds. Summer Team B, Spring Team, Winter Team, and Fall Team were placed in cryogenics around the same time. Summer Team A was placed 17 years before them, while Mozu was frozen a few years after Team A. Every team resurfaced at different times. The five teams are listed in order of appearance in the series, which is different from the order in which they were revived from cryonic preservation in the series' chronology.

Summer Team B

Summer Team B is created after the other four Japanese teams as a backup and consists of people who are healthy but rebellious or otherwise not well-adjusted to society. They emerge from cryonic preservation at the start of the series near an island in the East China Sea off the coast of Nagasaki Prefecture in western Kyūshū, and travel to the seed cache at the foot of Bungo Fuji in Ōita Prefecture.

A painfully shy, awkward and withdrawn 16-year-old girl. Natsu has difficulty expressing herself and was always put down at home and bullied in school. Nicknamed "Nacchan" by her friends and family She becomes essential to the team's survival by observing and writing down what they discover, such as which foods are edible. She has conflicting feelings for Arashi, knowing that he has a girlfriend. She is picked on or rather, teased by Semimaru frequently, in later chapters she grows close with Ango who helps her gain confidence in herself. Natsu means summer and iwashimizu means water trickling from rocks.

He is aged 17, brave and resourceful. He becomes close friends with Natsu and Semimaru and acts as Natsu's protector. He is generally depicted as a compassionate and considerate person. He is the boyfriend of Hana from the Spring Team and desperately tries to find her, hoping that she also survived. He was on the school swim team with Hana and is afraid of insects.

A young man with a rebellious personality, aged 18. He is close friends with Natsu and Arashi, and is their teams cook. He enjoys picking on Natsu but actually cares about her and tries to cheer her up when she feels upset. It is revealed that he is interested in Natsu. He shows jealously whenever Ango keeps looking at Natsu. At first, he wants to punch Ango for making an advance on Natsu but cannot do so, as he knows Ango is stronger. He, similarly to Arashi is also afraid of insects

The daughter of a farmer, aged 16. She had been running away from home prior to being cryogenically frozen. She has a vibrant personality when compared to the rest of the Team Summer B, besides Semimaru. She is close friends with Natsu is shown to have romantic interest in Ryou from Team Summer A.

An aloof art college student, aged 19. Chimaki loves painting and sculpting and has a habit of carving and drawing murals on rock walls.

Voiced by: Ai Tokunaga (drama CD), Aoi Yūki (anime); Caitlynn French (English) A 12-year-old girl with a strong intuition, who always accurately predicts the weather and is shown to have some level of psychic capabilities. She is the cousin of Hibari Nigusa.

A mysterious person of uncertain age (probably 37–38 years old), usually called just Mozu. He is very skilled at survival and stands out for having a name element, , that is a kigo of autumn instead of summer. In volume 6, when he meets Hana of Spring team while she is in despair, he offers to kill her. In volume 12, he tells Botan he is the nephew of the Prime Minister and a leader of the Seven Seeds project. A flashback reveals that he is responsible for the creation of the Seven Seeds program along with the selection of the members of Summer team A.

The guide for Summer team B. She used to be a policewoman and therefore skilled in self-defense. Very outspoken and straightforward in her communication.

Spring Team

The Spring Team emerges from cryonic preservation a few months after Summer Team B near an island off the coast of the Kantō region of central Honshu, and travel to Ogino Fuji in Kanagawa Prefecture, where they find a note from Natsu of Summer Team B. Later, Hana invites Takahiro, the surviving member of Winter Team, to join the Spring Team.

The 17-year-old girlfriend of Arashi. She is depicted as beautiful, attractive and strong-willed; she is described as a tomboy by Arashi and energetic by Fujiko and Haru. Hana learns an adequate amount of wilderness survival skills from her father during her childhood. She was on her school swim team and dabbled in rock climbing as a hobby. When she realizes that she may never meet Arashi again, she contemplates suicide, but when she learns that Arashi has survived in Summer Team B she becomes determined to reunite with the love of her life.

A young man with a strong body, aged 18. Mansaku is a skilled archer. He is depicted as laid-back person who enjoys meditation and Tang dynasty poetry.

A 17-year-old girl who aspires to become a doctor and an astronaut. She serves as an overseas medical volunteer before she is put in cryonic preservation. Fujiko gets along well with Hana.

A 16-year-old child-prodigy pianist, who can play other instruments such as the ocarina. He is depicted as intelligent but bratty, snobby and reserved. When he realizes the world he knew is gone, he tells Hana he is relieved to be rid of the pressures of winning competitions and performing flawlessly to please the public. He is attracted to Koruri and begins teaching her the joys of appreciating music.

A 12-year-old genius from Sendai who is called Momota by the others.

An 18-year-old woman from a prestigious family with strong political influence. She is a skilled potter. She is depicted as polite and obedient, using respectful language (see Honorific speech in Japanese), and is always drawn with her eyes mostly closed.

A 12-year-old girl who remains in a coma after being revived. She is the cousin of Hotaru Kusakuri and is cared for by Chisa.

The adult guide for the Spring Team. Before being put in cryonic preservation, Yanagi was a member of the Japan Self-Defense Forces. He is depicted as an arrogant disciplinarian and a misogynist. He dies saving the others by setting himself on fire after the giant praying mantis eggs that were laid inside his body hatched.

Winter Team

The Winter Team emerges from cryonic preservation in the Pacific Ocean off the southern coast of Hokkaidō about fifteen years before the start of the series. Three members die during the thawing process; on the way to the cache at Mt. Meakandake, they are attacked by a saber toothed tiger, killing their guide and Mutsuki. The remaining three, Mitsuru, Fubuki, and Takahiro, form a close relationship as they fight for survival.

The main character of the chapters about Winter Team. Takahiro is a talented and famous high-school baseball player, described as the best pitcher to appear in 50 years, and plays in the Kōshien. He is attracted to Mitsuru, but when he realizes she is in love with Fubuki, he helps the two get together. After Fubuki and Mitsuru die, Takahiro survives on his own with two wolves named after them, which he raises from puppies, until he meets Arashi, Natsu and Semimaru of Summer Team B in the ruins of Tokyo. Later, he meets Hana of Spring Team, who invites him to join them.

Another talented and well-known high-school baseball player who, like Takahiro, plays at Kōshien. He is described as the shortstop of the century. He gets together with Mitsuru shortly before being killed by a tiger while saving Mitsuru and Takahiro.

A high-school student who studies traditional Japanese dance. She initially pretends to disdain Fubuki, but later admits to being a fan of both Fubuki and Takahiro from before being put in cryonically preservation. Unable to bear Fukubi's death, she dances in the snow and freezes to death.

A first-year university student majoring in journalism. He jumps off a cliff after being mortally wounded by the tiger that kills Kumakawa.

A winter team member who dies during the thawing process. In the data books, she is seen holding chemicals in one hand.

A winter team member who dies during the thawing process. In the data books, her picture shows her sewing clothes, suggesting she may be a designer.

A winter team member who dies during the thawing process. In the data books, he is seen picking apples from a tree and collecting them in a basket.

The guide for the Winter Team. He is killed by a sabertoothed tiger soon after being revived.

Fall Team The Fall Team emerges from cryonic preservation about three years before the start of the series in the Sea of Japan off the coast of the Kansai region of western Honshu, and travel to Kobe Fuji in Hyogo Prefecture. They are led by Akio and Ran, who overthrew the Team guide Ryoya and keep the rest of the members enslaved with tasks such as raising corn, tending livestock and weaving fabric. Months after they meet Arashi, Natsu, and Semimaru from Summer Team B, the sky starts to rain ashes, which makes their hideout, field and everything they have built useless and unlivable. The Fall Team sets out to visit other Fuji and to find a safe place to live in.

The leader of Fall Team, once a young but successful Internet businessman who studied in America and became fluent in English and Spanish. He and Ran dominate the rest of Fall Team, forcing them to work to quotas.

An aggressive and selfish woman who used to work as an architect. She acts as Akio's enforcer and often practices English and Spanish with him so they do not forget their foreign language skills. She harbors a deep grudge against the organization that chose her to be a part of the Seven Seeds Project.

A former Olympic competitor in judo.

A kind, gentle woman who has experience staying in a farm in New Zealand. She falls in love with Ryuusei in the same team and eventually becomes pregnant with his child.

A young man who acts like a playboy.

A skilled diver, depicted as having a strong intuition about ghosts and spirits. She and Kurumi develop a close friendship.

A former law student with eidetic memory. Yamaki literally means eighth volume and is another name for the Lotus Sutra.

A former fireman and the irresolute guide for the Fall Team. When he meets Natsu, Arashi and Semimaru of Summer Team B, he attempts to poison them all but is prevented by Semimaru and Arashi. He is killed by Ango of Summer Team A in chapter 63, when he jumps to protect Ran.

Summer Team A The members of Summer Team A were specially chosen for the Seven Seeds Project by the Japanese government. This project genetically engineered and conceived about 100 babies, born from carefully selected egg cells and sperms. Because of this, none of the members of Summer Team A have a family name. These babies are raised on an island and taught wilderness survival until they reach the age of 17. At that time, a last test is carried out to select the seven that are put in cryonic preservation.

"Failures" or dropouts from this project are said to have left the island to join the rest of society, but it is revealed that they are actually killed and disposed of. Each child is instructed in seven classes of technologies: water, fire, wind, earth, plant, animal, and medical, and at age 13, they choose two classes to specialize in. In the end, one survivor is selected to represent each class. They emerge from cryonic preservation in the Pacific Ocean off the coast of southern Kyūshū, a little later than Spring Team.