|125px||This article is a stub. You can help Doraemon Wiki by expanding it.|
Jaiko is the younger sister of Gian, and sometimes she is spoiled by Gian. She is fat like her brother, but smaller.
She loves to write comic books and draw. In the future she will be a famous writer with lots of copies of her comic books sold.
This is known because of an episode that Nobita asked Doraemon to help him, and he got a tool that has the ability to bring stuff that a person, in this Nobita, will have in the future. He requested to the tool who would e standing next to him with wedding clothes, and Jaiko appeared. He got a quick depression and they travelled to the near Future, showing Nobita coming with Jaiko to an altar, and she was wearing a wedding dress. Nobita quickly fainted and he didn't realise that it wasn't a wedding! It was just an commemoration of millions of copies sold from Jaiko's recent success, a story related to wedding. Doraemon told all of this to him when they got back to the Present and guaranteed that she won't be her wife, but Shizuka will. Nobita was so happy, but Doreamon quickly warned him that Shizuka would not marry with a boy that always has bad results, so he ran to Shizuka's house, crying, and promising he would be a good friend and have a good result in the next exam. Doraemon was on the roof and used the tool to see Nobita's next exam's result, and it was pretty good judging his reaction.
Her first appearance was in the first episode of Doraemon.