Suneo

Suneo is the braggart who parades his material wealth in front of Nobita. He is often seen with Gian, who he bullies Nobita with; he actually hates Gian very much, so helping Gian to bully Nobita is probably to avoid suffering the same fate himself. Several stories start with Suneo showing off some new video game, toy, or electronic device his family has bought, or him needing Doraemon's help. He has an extensive knowledge of science, and he is a talented artist and designer

Takeshi

Takeshi, usually known by the nickname Gian (Giant), is big, strong, and quick-tempered. His nickname might mean giant. He usually wears an orange shirt. He is known for his confidence in his terrible singing and cooking. He regularly subjects the neighborhood children to horrendous singing recitals, which is sometimes combined with his homemade dinner. Many of the stories revolve around Nobita and his friends' efforts to avoid Gian's concerts.

Shizuka

Shizuka, usually called Shizu-chan or Shizuka-chan, is a smart and kind girl who is the object of Nobita's affections as well as his future bride. She bathes every morning, noon, afternoon, and evening, which leads to numerous accidental bath scenes. She is also known for takingpiano lessons unwillingly, which is sometimes used as an excuse for declining to hang out with Nobita. Her true passions are sweet potatoes and the violin, in which her playing is as bad as Gian is at singing. 

Nobita

Nobita is another main character of the series. He is a fourth grader in Tokyo and an only child. He wears glasses, a red or yellow polo shirt with a white collar, and blue shorts. Nobita's character flaws are endless. He is lazy, uncoordinated, dim-witted, frail, plain-looking, unlucky, and bad at sports. Nobita's normal day consists of arriving late to class, scoring zeros on his exam, getting yelled at by his teacher, being bullied by classmates Jaian and Suneo, falling into curbside rain gutters, being chased by dogs, and getting yelled at by his mom for refusing to do his homework. However, his flaws and struggles are what drive the storyline

THE POCKET

Doraemon has a pocket from which he produces many gadgets, medicines, and tools from the future. The pocket is called yōjigen-pocket (lit. fourth-dimensional pocket). Some of the gadgets (dōgu) are based on real Japanese household devices with fanciful twists, but most are completely science fiction (although some may be based on folklore or religious stories). Thousands of dōgu have been featured inDoraemon. The number of dōgu has been approximated at 4,500. It is this constant variety which makes Doraemon popular even among adult readers/viewers. In the series, the availability of dōgu depends sometimes on the money Doraemon has available, and he often says some dōgu are expensive in the future. The more famous ones include the "bamboo-copter" (very similar to the ones that appears on the older series of Beany and Cecil), a small head accessory that allows flight; the "Anywhere Door", a door that opens up to any place the user wishes; and the "Time Machine". Some of the recurring dōgu appear also in Fujiko F. Fujio's other works such as 21-emon, Kaibutsu-kun, Kiteretsu Daihyakka, Mikio to Mikio or Pāman.

THE CHARECTER

Doraemon is sent back in time by Nobita Nobi's great-great grandson Sewashi to improve Nobita's circumstances so that his descendants may enjoy a better future. In the original time-line, Nobita experienced nothing but misery and misfortune manifested in the form of poor marks and grades, physical disasters, and bullying throughout his life. This culminates in the burning down of a future business he set up which leaves his family line beset with financial problems. In order to alter history and better the Nobi family's fortunes, Sewashi sent him a robot called Doraemon.