A member of the Devee Tribe which are yellow humanoid creatures that wear pots for hats. Nene poisoned the entire Devee Tribe of Lago Village except for Marumaro and told him that if he retrieved a special elixir from the Ancient Hospital Ruins, that Nene would supply a cure for the Tribe. Marumaro first appears in a Drill Machine on the way to the ruins. When he first encounters Shu, Kluke and Jiro, he is intimidated and fights them. When the ship reaches its destination, Marumaro runs away to find the cure. At the Hospital Ruins, Shu saves Marumaro from the Icefire Wolf Ghost and then helps him find the cure. As they return to Devee Tribe, he gives the tribe the cure and the effects are catastrophic. He soon discovers that Nene tricked him to make himself more powerful and is forced to cure the tribe with a new antidote much more difficult to find and then joins the group afterwards to get revenge on Nene. He has tendency to end his sentences by saying "Maro". In the anime, Marumaro is obsessed with girls (he also acts like a pervert in the original version, and his actions often end up angering Kluke and Bouquet). He joins up with Shu and Co. after the village he was staying at was destroyed and its inhabitants were captured by twin Shadow users Ivanov and Gustuv. Two years later, Marumaro is back in his village until Noi reawakens his shadow. Upon joining up with Shu and Bouquet, Marumaro develops a competitive rivalry with Noi. He owns the shadow Saber Tiger who uses monk charged attacks In the anime, Saber Tiger thinks himself of as a defender of justice and encourages Marumaro to feel the same way.
A GHQ Anti Bodies Intel officer. Rowan usually assists his superior officers.
Naitou is a guy that transferred into Futaba Yoshioka and Kou Mabuchi's middle school. He was a close friend of Kou.
Five years ago, in the Kamikaku Island incident, she lost both her parents and her memory. The island was completely wiped out, and she was the only survivor. Her wealthy maternal grandmother took her in. Her grandmother was worried about her and did not want her to have to commute to school, so she had her educated at home by tutors. Eventually, knowing that she herself might not have long to live, her grandmother enrolled her in a girls' residential school, Kaihou Academy. Enrolled against her will, she misses her home, She can't hide how she feels distressed.
Mai is Tatsuya's younger sister who attends the same school as him. She is the part leader for the flutes in the concert band in her school.
A mysterious being from the moon, Wreathlit, generally known as Wreath, appears to be a young child but is actually much older. She is constantly watching Feena, especially in Feena's story path where she is in love with Tatsuya; a voice tells her that the moon and earth must not be united.
Emperor Zool is the dictator in control of Gishin and many other planets he has conquered. When Takeru was a baby, Zool took him from his biological parents and sent him to Earth, with the mission of destroying the planet when he's older. A cruel ruler, Zool has enslaved many people and inspired many rebellions. His ultimate wish is to control the entire known universe. Nobody can confirm if he is even human, because he is never seen without his mask and cloak... He is later revealed to be the god of death, ruling over the dead from a hellish celestial body called the Burning Star.