Touka Ryuumonbuchi

Touka Ryuumonbuchi (龍門渕 透華 Ryūmonbuchi Tōka) is a second year student at Ryuumonbuchi High School, the president of the mahjong club, the daughter of Ryuumonbuchi High School's principal and the cousin of Koromo Amae.

Appearance
Touka has long blonde hair, blue eyes and her most striking feature is her ahoge (emotional hair) on the top of her head.

She wears Ryuumonbuchi's uniform most of the time.

Personality
Touka is an eccentric girl who loves to stand out and hates it when others stand out more than her. She is an oujo-sama, having a personal butler and maid, and is very ladylike most of the time. However, this is thrown out the window when she interacts with Nodoka Haramura. Besides being somewhat jealous of the attention Nodoka gets, Touka derives physical pleasure when playing at the same table as Nodocchi.

In contrast to her somewhat snobby attitude, Touka cares a lot for others, especially Koromo Amae as demonstrated by her motivations for entering the team tournament. She is very motherly towards Koromo, yet dislikes being told so.

Prefectural Tournament Arc
Touka first appears with the rest of Ryuumonbuchi (minus Koromo) before the first round of the tournament, loving the attention of a swarm of reporters. While Saki Miyanaga is lost in the hallways, we see Touka walking with Jun Inoue, Tomoki Sawamura and Hajime Kunihiro and conversing about Koromo over sleeping. As they pass by Saki they feel her aura and say that it's similar to Koromo's. She also notes that Saki is not Haramura because she doesn't have pointless blobs of fat on her chest. We next see her taking in Nodoka's first match in disguise, wondering about her strength and her popularity (and Etopen). After taking in the battle and being convinced Nodoka Haramura is indeed the online legend Nodocchi, Touka races to tell the others that she isn't so sure of a "complete victory". At the end of the first day of the tournament, it is revealed that Ryuumonbuchi made it to the finals with ease.

Next we see herin the final round's vanguard battle; being ticked at Kazekoshi winning and telling Jun to admit her defeat like a man. When it is Tomoki's turn, we see her briefly commenting on the battle and afterwards being furious that Tomoki was "useless", saying that no matter who the opponent is, Ryuumonbuchi should never place as low as third. Nonetheless, she is cheered when it is Hajime's turn, saying how they'll destroy the others without the need of Koromo. She is then seen fiddling with Hajime's restraints before the girl's battle, saying it's just a precaution. Touka then comments throughout Hajime's match and it is revealed that two years prior, she found Hajime and wanted her despite knowing of her devious past. She told Hajime that she had purchased her from her dad and that she wanted her not for her sleight of hand technique. To be fair to her, she would play against Koromo for her freedom from the constraints, but she lost. When Hajime is getting on track in her match, Koromo Amae comes crying to Touka because of Nodoka's ripped penguin. Touka orders [Hagiyoshi]] to fix the penguin and afterwards to follow Koromo to make sure she doesn't get into anymore trouble. When Hajime's battle ends, Touka congratulates her on a fine game and wonders if it is time to remove the restraints, but Hajime declines saying that she felt closer to her, causing her embarrassment.

Before her battle began, she is seen calling Nodoka out but is ignored. When the battle starts, Touka focuses on Nodoka and how she was slowly transforming into Nodocchi. As Nodoka's victories started piling up and giving her all the attention, Touka went into her cold state. Hajime thought that she was playing recklessly just to stand out more, but Touka won a big hand. However, since she had abandoned her digital style, she started to fall victim to Momoko Touyoko's "stealth mode" and fell behind in the battle.

She is later seen commentating on Koromo's strength throughout her battle and is greatly shocked when Koromo loses.

Individual Tournament Arc *Anime only*
Touka appears with the rest of Ryuumonbuchi going to her family owned pool before the start of the tournament and there they meet Kiyosumi. After a quick exchange they head toward the VIP room. While there she expresses her desire to show up Nodoka Haramura and reveals her promise to take Koromo Amae back to Tokyo. Then a flashback to last year when Ryuumonbuchi went to the national tournament happens. Afterward Touka again tells her she'll win the tournament and that they will go to Tokyo as her entourage. After a bit of teasing Touka gets embarrassed when Hajime Kunihiro calls her a softy, causing her to to storm off to the sauna.
 * The anime is different here in that Koromo Amae has already patched things up and understands that Ryuumonbuchi loves her*

At the tournament, Touka enters the individual tournament as the reigning champion and looks to do so again. She starts off strong winning a few matches but is foiled by Kaori Senoo's great beginner's luck. Being depressed afterward Hajime comforts her and she goes back to being her usual eccentric self. She does good enough to advance to the second day. When next we see Touka she has climbed to fourth place overall heading into the final match of the tournament against Hisa Takei, Mihoko Fukuji and Yumi Kajiki. She plays well but ends up losing a close game. Because of this Touka did not get to advance to the national tournament. We later see her during the car ride home devastated that she didn't win.

Sometime after the tournament we see her along with Hajime reading a bedtime story to Koromo to get her to sleep. After Hajime tells Touka she has fallen asleep, she calls Touka her mother and embarrasses her. Hagiyoshi then enters the room with the invitation to the combined training camp set up by Kiyosumi. Later she and the rest of Ryuumonbuchi were deciding whether or not to go, with Touka voting yes because she gets to battle Nodoka once again and saying that their battle for the true idol was left unfinished. They end up accepting thanks to Koromo wanting to go.

Combined Training Camp Arc
Touka appears with the rest of her teammates as Harue Akado requests a friendly match between the two schools where Touka greets Achiga and after Koromo defeats her opponent, she tells them that she isn't even at full strength.

Touka is then seen at her mansion looking for Koromo and being very concerned about her. After she is found she and the rest of Ryuumonbuchi convince Koromo that they are a family as well as her friends.

When they arrive at the training camp, she comments to Hajime Kunihiro how nice it is that Koromo has made friends out of Nodoka and Saki. Later, back in their room, Hajime notices and fears that "cold" Touka is coming out due to playing too many strong opponents. The next day when Saki, Koromo and Yasuko Fujita are looking for one more player to play, Touka challenges them in her "cold" state and decimates them before passing out. When she awakens Tomoki Sawamura and Hajime show her the play records from before. However, she denies it's her because it was too different from Nodoka's playing style.

National Tournament Arc
Touka and Koromo Amae show up at Kiyosumi's hotel bath much to the shock of the others. It was stated that they're staying at a hotel in Shinjuku. She again appears during Kiyosumi's free time, dressing Nodoka Haramura as a maid and having dinner with the rest of Ryuumonbuchi at the family restaurant they promised to take Koromo to. She also shows up briefly before Kiyosumi's first round match stating that if they lose she will make Nodoka her maid. Touka is later shown with Koromo watching Nodoka's match, getting excited when she sees that Nodoka has awakened early in the match.

Final Eight Arc
Touka is shown watching the semi-finals with Hajime Kunihiro and Koromo Amae. When the camera only focuses on Nodoka Haramura, Touka voices her displeasure. When Yuuki Kataoka calls during her match, she guessed the fact that Hisa Takei didn't use her ability during the second round.

National Championship Arc
Touka is amazed at the rare yaku that keep being displayed in the vanguard match. She then mentions that Hajime Kunihiro could cheat and get one hundred of them. After the match she notes that Teru Miyanaga is unbelievable as always. Hagiyoshi then pops up and asks Touka if she could watch the video they filmed in Kiyosumi's room earlier. It immediately shows Nodoka Haramura's breasts and Touka is furious. Hagiyoshi then says a few frames back Etopen was shown to be damaged. Touka realizes that Etopen helps Nodoka relax and "keeps her breasts stable" so she calls Hisa Takei and informs her.

While watching Hisa play, she notes that she is as good at handling tiles as Hajime. She protests but Touka tells her that she's bad at losing.

Playing Style/Abilities
Touka's normal playing style is similar to Nodoka Haramura's style in that it is a Digital style. She uses a careful approach to obtain easily winnable hands. What differs is that she uses her emotions to "ride the flow" when going up against strong opponents. When Touka enters her Cold state, she utilizes flow control without the hinderance of emotion, and her skills greatly increase. So much so that she can dominate very strong opponents like Saki Miyanaga, Koromo Amae and even Fujita-pro at the same time. However, she loses consciousness after a few games and suffers from amnesia. When Hajime Kunihiro show her the playing record, she refuse to admit that this is her playing style.

Etymology

 * The name Touka means "transparent" (透) (tou) and "flower" (華) (ka).
 * Touka's surname Ryuumonbuchi means "dragon" (龍) (ryuu), "gate" (門) (mon) and "deep pool, deep water, abyss" (渕) (fuchi/buchi).

Trivia

 * In the anime version of the combined training camp, Touka is shown to be an excellent ping pong player.
 * Touka is the previous years prefectual individual tournament winner.
 * Touka's height is 163 cm (5'3).
 * Touka's grandfather owns the school.
 * Touka likes to draw attention to herself and at the same time she hates others who draw attention to themselves, particularly Nodoka Haramura.
 * Hajime Kunihiro stated that Touka is like the mother in their family.