|Maria||Temporary Maria to... everyone.|
|Likes||Jita, Taking Baths With Mafuyu|
|Voiced by||Aki Toyosaki|
|First Appearance||Episode 1 (Anime)|
Chapter 1 (Manga)
Tomo has shoulder length dark blue hair and crimson red eyes. Her best known features are her large breasts, but she is physically weak. Tomo is the spitting image of Sasha's original protector, Olja, which explains why he took so willingly the role of Tomo's guardian, much to Mafuyu's chagrin. Also, sometimes an upside down Eastern Cross (with its third slab being a scar), the symbol of the Adepts, appears between her breasts (This is replaced in the anime with the Qwaser of Gold taking over her body in the anime). Her breasts are the biggest in the series up until episode 23, where Mafuyu becomes equal to her in size.
Tomo is the exact opposite of Mafuyu, both physically and mentally: she herself is very childish and naive, yet very sweet natured and kind hearted, prefering peace over conflict. She deeply loves Mafuyu and Sasha, as seen when she snapped at Jushua for his plans to use her to get to them. Given her kind-hearted nature, she is also very friendly, and forgiving. She befriends Jita, even after she would've killed Tomo. Tomo also befriends Asta while in captivity under the Adepts.
Tomo has been with Mafuyu since childhood, and Mafuyu always promised to protect her. In their high school days, Tomo is constantly bullied by Miyuri Tsujidō and her friend Hana Katsuragi. Miyuri threatens to kick them out of their dorm if Mafuyu doesn't do as she says. Tomo would tell her that if you pray, then god will help you. Soon after finding Sasha, the "Masked Murderer" appeared. Sasha quickly defeated her and transfers into Mafuyu and Tomo's class, only to make a memorable impression of Miyuri and the rest of his classmates. However, thanks to Tomo's appearance resembling Olja, Sasha befriends her and her best friend/protector, Mafuyu, even after rescuing her from the villianess Ayana, who had pretended to be the girls' friend in order to get to Tomo. The symbol that frequently appears on Tomo's chest is later revealed to be the presence of the Qwaser of Gold, which apparently inhabits Tomo's body as a disembodied projection and, as itself stated, is slowly draining her of her life. This is why she has to constantly replenish herself with Soma. Indeed, it was revealed that the Qwaser of Gold does have some control over Tomo, as he/she possessed her and tried to unseal Sword's Maria. The plan still backfired, and now Tomo is apparently free from his/her control and possess the other half of the incantation, with Mafuyu possessing the first. She is currently held at the Adepts base of operations, where she meets and befriends Jita, Jushua's younger sister, who is also a member of the Adepts.
In the anime, her role remains much the same, but there is no mention of the Qwaser of Gold draining her life away, though he still possess her body. He took personal delight in groping and sucking Tomo's breasts. She also does not posses the second half of the Sword's Maria. At the end of the first season of the anime, she returns to Mihailov Academy with Mafuyu and Sasha, after they defeat the Qwaser of Gold. However, Sasha had to leave in order to train to fend off stronger threats. Sometime between the end of the first season and the start of the Seikon no Qwaser II, Mafuyu left Tomo behind so she should train with Katja in order to learn how to control the Sword's Maria. She was regularly visited by Fumika and Miyuri, whom was actually lonely without Mafuyu around. That is, until the episode seven of season 2, when Jita is brought to the academy. Tomo offered to take care of her, since she can't use her powers with the nipplelock in place. At the end of the episode, Sasha and Mafuyu came back to school and happily reunite with Tomo. In the later half of the second season, Tomo was one of the girls Sasha had taken soma from on a regular basis.
- Tomo Yamanobe has an odd tendency to breastfeed herself for comfort or just for showing she is able to.
- She is the only girl who willingly lets Sasha sleep with her for comfort.
- She has the lowest level of modesty among all the females in the series, as she is careless of whether she appears naked or topless in front of males or not.