has a large cast of characters.

Character histories

Main characters Voiced by Junko Minagawa (Tohma) and Satoshi Goto (Sess/Seth) (Japanese), Edward Choy Keng Choong (Tohma) and Joe Murray (Sess/Seth) (English) Tohma is one of the main protagonists of the series. He is an enthusiastic and energetic young boy, who is impulsive and quick to anger, but has good intentions and looks out for both Helga and Chitto. He lives with his mother and father on Papen Island and is homeschooled by his father, who teaches him a unique form of martial arts called Papan Kenpo. Tohma first meets Helga after she ran away from an orphanage in Chikao, and he later helps her escape permanently. Near the end of the anime, Tohma is revealed to be the reincarnation of , the son of Titas' trusted friend and advisor, Goto. Sess was betrothed to Tina since his birth because of their parents' friendship; during his and Tina's first meeting, he vowed to protect her. Sess loves Tina deeply but she does not reciprocate due to her love for Soran. Sess becomes jealous that when Tina wreaks havoc while in a trance, it is Soran's voice and not Sess' who reaches out to Tina. Upon hearing that Tina's soul is about to be sent to Earth, Sess kills Soran with a discarded gun, causing Sess to become horrified of his actions. Attempting to redeem himself, it was Sess and not Soran who sent Tina's spirit to Earth before dying of his injuries sustained from the attack caused by Tina's trance and later from Georca's forces, unaware that he was near the Orsel that causes his soul to be reincarnated on Earth as Tohma. At first, Tohma doesn't remember anything of his past, though his feelings for Helga remain until the end of the anime when he finally recovers his memories after discovering Tina's corpse. Unlike Helga and the Befort Children, Tohma along to Chitto does not appear as an adult in the epilogue nor in the extended special ending. Voiced by Shiho Kawaragi (Japanese), Meriem Bekka (English) Helga is the other protagonist of the series. She is a reserved and introverted young girl who spends much of her time drawing pictures and often worries about others around her. She and her friend, Chitto, attempt to escape from an orphanage to search for a place Helga has envisioned, which was often the subject of her drawings. She is revealed to be the third reincarnation of the princess of Greecia, , a caring, cheerful and tomboyish daughter of King Titas. After being killed in an explosion and revived using Orsel, Tina becomes little more than a weapon. To prevent an all-out war in Greecia, the scientists use the Orsel to send Tina's spirit onto Earth. However, during her final moments in Greecia, she was not sent away by her lover Soran, but by her betrothed Sess, who killed Soran in a fit of jealousy, only to regret his mistakes and it was he and not Soran who send Tina's spirit to Earth instead. Prior to her life as Helga, she was first reincarnated as a teacher named Christina, and then a painter named Serafine. At the end of the anime, Helga is finally reunited with the reincarnated Soran as a 21-year-old teacher in school. Voiced by: Kei Kobayashi (Japanese), Marian Elizabeth Spencer (English) A good-hearted young boy who wishes to earnestly help Helga in her quest to find the place from her drawings. Like Tohma, Chitto does not appear as an adult in the epilogue nor in the extended special ending.

Befort Children The are a group of children who, for 500 years prior to the story of Fantastic Children, have been spotted in various places throughout Europe in the story. When they were first born into families, they had natural-colored hair, which shortly after turned white and their eyes turned blue. They run away from their families and join the group, only to die at around age 12 and be reborn elsewhere. The Befort Children come from the planet , which is mostly made up of water, in search of their princess, Tina.

Leader of both the Befort Children on Earth and the team of scientists during their time spent on Greecia. He often does the talking for the group and takes responsibility for their actions. He comes across as a very quiet, distant person, but he does in fact care more about the people around him than he lets on. This side of him rarely shows through because he is so determined to find Tina and often scolds the others for not having their priorities straight. On earth, his host family called him Ian Cole, and he had one younger sister, Belle. Though he never outright admits it, the viewer learns that he was in fact attached to his sister and to his family (his mother says he did everything he could to help out, as if he knew he wasn't going to be there forever). The series' special ending showed him returning to his home and sister on Sanceli Island. A later scene showed him with his hair having returned to its original brown.

She appears to be second in command because she is often by Agi's side. She, too has a very strong will and determination to find the princess, which masks her longing to return home, although she does seem a little more sympathetic towards the other members when they make mistakes. It is she who first learns of Helga and reports this information back to the rest of the children. On Earth, she was an only child named Flo, but after she left her family to search for Tina, her father changed drastically from a strong, lively man to a drunkard. Soreto sees him in the window of the Lam Café in Clairmont as she is running back to tell the others the news; their eyes meet, and instantly he rushes out to find her. She then ducks into an alleyway, crying to herself as he runs off down the street. The series' Special Ending shows her return to her father. She lived in Northedge.

Of all the Befort Children (sans Palza and Mel, who leave in the first episode), the one whose life on earth we know least about. Nothing is revealed about the life he led before breaking away to search for Tina, but then again, he doesn't want anything to be revealed. Hiisuma hates the earth and the people living in it and will stop at nothing to return to Greecia. But like all the others, his bad attitude is just his way of coping with the situation; he just takes it to another level. Unfortunately, Hiisuma is easily controlled; on Greecia, Georca and his cronies take him hostage and force him to use the Orsel control board when Tina goes berserk, and on Earth he makes a deal with Dumas (which backfires on him) in order to get the data he needs from the GED organization. Hiisuma dies after Dumas betrays him and sends the capsule containing their preserved Grecian bodies crashing down on the earth from the skies, where he finally reveals his true emotions and his strong desire to return to his homeland. The series Special Ending briefly depicts his funeral. In attendance were apparently a mother and father, brother and sister, two men, a priest, and one other couple. On Earth, he went by the name of Thomas and lived in Wattford.

Of all the children (even Palza and Mel), appears to be the most emotional and weak-willed, with Hiisuma perhaps being the most cold-hearted and strongest. Enma nearly consumes him twice, tempting him with memories of the life he could have had on earth, where he had been born into a noble family as Andrew Chaseman in the 16th century. A portrait of Andrew/Hasmodai from 1581 was found in Romania by Radcliffe. In his current incarnation, he was known as Teo and lived in Otorad. He and Tarlant also express their desire to have a little bit of fun every now and then, which leads to them taking Wanda out on something of a joy ride and consequently being punched in the face by Agi. The series special ending shows him returning home to be reunited with his older sister, Serena.

The one who created Wanda (Wonder), a large robot with a mind of its own. Not much is known about his life on earth besides the fact that he once had a dog named Baron. His name on earth was Kalie, and he lived in West Silies. Like the other children, he tries to put up a serious (and at times snippy) front, acting like he can handle himself without anybody's help, but it becomes clear that he just wants to return to his old life on Greecia like the rest of them or, if that's not possible, live a peaceful life on earth. He is the first of the Befort Children to meet Tohma, who bumps into him while searching for Helga and then fights him on Kokkuri Island. The series Special Ending showed his return to his father and a dog named Wonder (like the robot).

The second to leave the Befort Children's group, although she leaves because she loses her memories. After Palza's departure, she secretly arranges to be reincarnated before the others, in order to see Conrad Rugen (Palza) as a man. She is older than the others, she reaches the age of memory loss before the rest of the group. In her next incarnation, either as a result of her previous action or from weakness at losing Palza, she loses her memory early again. This is when Dumas finds them standing over the deceased Serafine (Tina's incarnation), and because she refuses to escape with people she can't remember, Mel is captured by one of Dumas' men. When the events of Fantastic Children take place she has been reincarnated as Dr. , born on August 17, 1960, in German Khartoum. She graduated from the Rennep-Gymnasium in 1973, after which she attended and did post-graduate work at the Ludwig-Maximilians-Universität München. She became the director of the GED organization at the age of 23, and she uses both Conrad's old notes and the scientists from Greecia's findings, through her current life as Gherta continues to torment from her previous life's memories at Dumas' hands wherever she goes. Unlike Conrad, Gherta/Mel does eventually regain her memories (with Soreto's help) and in the end uses the GED organization to aid the children. Though Conrad died long before Gherta's time, she feels attracted to the idea of him because she was Mel and he was Palza and that bond hasn't gone away. Voiced by: Maaya Sakamoto (Mel), Yuki Kaida (Gherta) (Japanese)

The first Befort Child to drop out; unlike Mel, he does it of his own free will. On Earth, he was born (Rugen), with one younger brother. When Agi and co. confront him and try to get him to join them once more, he breaks down, telling them what they did back then was wrong and he wants to be able to live a peaceful life once more. After this, he loses his memories of Greecia and becomes Conrad entirely. However, he does not lose his love of science and does remember some of their findings, which led him to discover X-Rays on earth. He also retains his feelings for Mel. When she sees him as Conrad, she can't help feeling somehow attached to him somehow. Back in Greecia, the two of them were engaged and would've gotten married shortly after Tina's own wedding, had Georca not launched an attack on the palace. His discovery is used by the GED organization to use Orsel to send people into the land of the dead several years later. Voiced by: Chihiro Suzuki (Palza), Naomi Shindou (Conrad) (Japanese)

Detectives

Nguyen Hue Cooks is a policeman on the trail of the Befort Children. Cooks is supposed to be investigating the case of the missing child, Flo (Soreto), but he notices that the photos of Flo, and several other children who went missing at the same time, bear a striking resemblance to a photo his grandfather took of the Befort Children 100 years ago. He does run into the children several times, but they are unresponsive to his questions. When he meets them in the GED organization's lab, he starts trying to spy on Gherta and her team as well.