|Birthday||November 30 (Sagittarius)|
|Relations||Yakumo Tsukamoto (sister)|
|Plan1 from Outerspace|
|Season 2 OVA Episode 2|
According to the last Japanese poll performed by the publishers of the manga, Tenma is the fourth most popular character in the series.
Tenma has dark blue hair (black hair in the manga) and dark blue eyes. Her trademark is the small pigtails that wiggle when she's happy or excited. Whenever she is upset or tired, her pigtails come down, just like a dog does with it's tail. She is usually seen in her school uniform, even when she went to school in America, as shown in the manga, but will wear other clothes, like during summer and winter break. Tenma is short, immature and flat-chested for her age, which in turn causes people to mistake her for a middle school student, usually insulting her.
Tenma is shown to have a very naive and positive personality. She usually puts her positive thoughts with her determination to get close to Ooji Karasuma. Tenma worries she has no good qualities, as she can only think of the bad qualities she has. She is quite childish, but really wants to be thought of as a woman. Tenma has a habit of misunderstanding and misinterpreting situations, even obvious ones. She is quite naive and gullible, as she is willing to trust anyone. Her pigtails adjust according to her mood.
Tenma is shown to be bad at cooking, sports, and academics. She is the only person who can cook worse than her friend Eri Sawachika. She fails at most sports she tries, but is surprisingly good at archery and skiing. She also learns to swim early in the series. Grade-wise, she usually gets all turtles (which is supposed to represent an F). Tenma is fairly clumsy, only adding to her worries that she is talentless. It is possible that she has a slight psychokinetic power, as she talks about bending spoons a few times to Yakumo Tsukamoto and was once shown bending a spoon in an OVA. She has also shown some martial arts abilities to some extent, for example, in episode 5 during the flashback of her and Kenji Harima's first meeting she is shown to be able to flip Harima onto the ground despite his size.
Ooji is Tenma's huge crush as she will always chase after him ever since the beginning and also throughout the series. There are times when something backfires whenever she gets so close to him. In Episode 3 of School Rumble First Semester, there is a time when Tenma needs to draw Karasuma in an art class. At this time, she sits still embarrassed at how the boy she likes is so close to her. But later on during the series, she recovered from that weakness and was able to get closer to him without being embarrassed. This is shown in Episode 8 of School Rumble First Semester to when she invited him to eat riceballs with him together during lunch. She also travels to America, to learn medicine so that she can help Karasuma with his illness.
Tenma doesn't necessarily have a crush on Harima, though has shown compassion for him throughout the series. Harima is the "pervert" that saved Tenma from bullies. When Harima takes her to his home and puts her to bed, she grabs him and says "I love you" even though she was half-asleep. This made her wake up and scream thinking Harima is a pervert. Tenma eventually appreciates his feelings, but is still truly in love with Karasuma. Tenma switched places with Iori (Yakumo's cat) in one episode, and when Iori in Tenma's body pounces on Harima, he instantly thinks she's fallen in love with him. Tenma is still naive to Harima's feelings for her, but still acts friendly around him. Yakumo surprisingly is the one to fall in love with Harima, much to the disappointment of Hanai Haruki. When Harima goes to the airport with Tenma on the motorcycle, he admits that he's in love with Tenma to himself not knowing that he was thinking out loud and Tenma, who was right behind him, heard everything he said. Tenma pretends to not know that Harima loves her and leaves Japan for the United States. When she arrives there, she realizes that Karasuma has picked up a rare disease and forgotten everything about her but Tenma still wants to be with him. Later, Tenma comes back to Japan and everyone from class 2-C participate in a pie fight. Harima then saves Tenma from a pie and tries to tell that he loves her, but when he was about to say it to her (not knowing that she already knows), Tenma looks at him with loved-filled eyes which Harima thinks means she loves him too. He becomes certain this is the case and, becoming emboldened, is about to confess when she starts to sniff and sob. Tenma then tells Harima that she wants to go back to America and study medicine so she can help Karasuma with his illness. Harima lets her go, saying that he wants her to be happy so he let her go to America.
This is a very brief rivalry. In School Rumble Second Semester at the basketball arc, Tenma is shown to act as Mikoto's rival when Tenma went and joined The Outlaws with Masakazu Togo, Kyosuke Imadori, Yakumo Tsukamoto, and Kenji Harima. During the basketball game, Lala Gonzalez was actually fouled out by pushing Tenma and with Tae Anegasaki secret weapon, Tenma was brought back to the girl's basketball team and the rivalry seems to have broken off.
In Tenma's point of view, this was a very serious one-side rivalry against Harima. Right when he got locked out from Itoko's apartment, Yakumo invited him to stay at her place. One night, Harima went into Yakumo's room thinking that its Tenma's room, telling her that he likes her and its a misunderstanding that Harima and Yakumo are dating. Tenma doesn't believe him and thus kicked him out of her house. This one side rivalry occurred between School Rumble Second Semester Episode 16 to the middle of Episode 19. At the end of Episode 19, Tenma came to realize that Yakumo is just helping Harima with his manga and that it was a misunderstanding that them two are dating.
Yakumo is Tenma's younger sister and the only known relative. But because Yakumo is taller and more mature, Tenma is usually mistaken to be the younger one. Her father is only seen once, reading a story book to Yakumo in a flashback. It's also interesting to note that both Yakumo and Tenma have both shown exceptional fighting capabilities; Yakumo when she manages to dodge all of Haruki Hanai's attacks with ease during their confrontation and Tenma when she first met Harima, tossing him to the floor despite Harima being larger. How both Tenma and Yakumo attained their fighting prowess is unknown.
- "I tripped and fell down the stairs"
- "Wow, I'm starting to feel a little loopy...."
- "Bananas! Hooray!"
- "I don't think I'm cut out for manual labor, I need to get a more creative job, like saving the whales."
- "Yakumo, I'm starving! FEED ME!!"
- "Yakumo, you're the best sister ever!"
- "BIG SISTER POWERS ACTIVATE!!"
- The name Tenma means "heavens, sky" (天) (ten) and "fullness" (満) (ma).
- Tenma's surname Tsukamoto means "mound" (塚) (tsuka) and "base, root, origin" (本) (moto).