Tachibana (立花) is one of Shizuka's friend in the series. In the earlier versions, she is commonly credited in the credits as Classmate (クラスメイト Kurasumeito) or Girl (女の子 On'nanoko, literally meaning female child), and is a background character of the series. She has been rumoured by fans as the wife of Dekisugi, due to her striking resembling to the wife and she was seen together with Dekisugi in one episode. But the rumors were refuted because Dekisugi's wife herself in the Manga and Episode versions of "Winning Back Shizuka-chan" turned out to be a Foreigner, While Tachibana herself is a local girl.
Her most prominent appearance was in the episode Gravity Paint, where she has a speaking role and is treated as a supporting character in the episode. At episode 609: Arranging Railway by Myself, of Doraemon (2005 series) her name has finally been revealed, where her name is displayed on the train route map.
She has brown curly hair. She commonly wears a yellow blouse with a red or orange skirt.
Her clothes sometimes follow a pattern. If she wears a red skirt she is usually wearing orange shoes with it, but if she wears her orange skirt she wears red shoes with it.
Tachibana and Shizuka are often friends, and is always Shizuka's other friend rather than Nobita, Gian, or Suneo. She was most known to be Shizuka's other best friend since she is seen a lot with her. They were seen together in some episodes, notably Gravity Paint. They also appeared together in the 2005 anime episode Suneo is the Ideal Big Brother. They appeared together along with other girls in the 2005 version of Romance in the Snowy Mountain.
Both of them has a fine relationship. In the episode Trying to Goodbye, both of them went together to bid farewell to Nobita when he was going to transfer to America.
She's notably being friends with Yasuo and Haruo. In some episodes she's both with him, especially in some scene with Haruo too.
- In Gravity Paint and the 2005 version of Romance in the Snowy Mountain, she was given a speaking role.
- Chie Nakamura also voiced Hideyo Dekisugi.
- Sometimes she appears with both Yasuo and Haruo
- She is actually the same character model as Paruparu's.
- Jamako from 1973 anime is also the same model as her.
- She's the Class Leader in Nobita's class
- She is also a friend of Etsuko and Nakamura.
- Tachibana character design was very iconic with others Fujiko Girls, like Miyoko Nonohana (Kiteretsu), Eri Kasuga (Chimpui), Michiko Sawada (Perman), Yoko Akimoku (Biriken), etc. Most of the curly-haired female characters are inspired by Mr. Fujiko Wife when she was young.
- She resembles Yoko Akimoku from Biriken.