Doraemon is a blue robotic cat from the 22nd century, who weighs 129.3kg (285.05lbs) and measures at 129.3cm (4'3") tall. He was manufactured on September 3rd in the year 2112, bearing the code MS-903, at the Matsushiba Robot Factory. Doraemon is considered a substandard product because many of his robotic features (ie. radar whiskers and cat-calling V.ll) malfunctioned after production. During his manufacture, he got struck by lightning and lost an important screw that was part of his brain, thus affecting his performance in both his studies and towards society.

His favorite food is Dorayaki. According to a story arc in the spin-off manga series, "The Doraemons", Doraemon's original paint color was yellow. His color changed after getting his ears gnawed off by a robot mouse. This caused him develop fear of mouse and slip into depression on top of a tower, where he drank a potion labelled "sadness", which augmented his depression to the point where, as he wept, his yellow paint washed off, and his voice deepened. These events are what caused Doraemon to develop musophobia, despite the fact he's a robot cat. These events were also animated into the 2005 intro to the current anime series.

Doraemon also has a fourth-dimensional pocket on his body from which he can acquire various colourful, awesome and futuristic gadgets Doraemon, the champion of the 30 Dorayaki Eating Contest, ate a bedroom sized dorayaki by himself, and went into the Genius Book of Records for eating the largest dorayaki the quickest. He also has a dorayaki encyclopedia to find the nearest and best dorayaki shops. He also like to eat watermelon, pudding,tea, juice and various cakes. He gets angry when anyone tries to eat dorayaki without offering him one.Nobita is a lazy person. He normally wakes up late for school and often dozes off in class. He naps almost every day after school, making him unable to sleep at night and wake up late the next morning. This creates an endless cycle of laziness. He is also shown falling asleep in class in some episodes.

Nobita does not do well at school. He regularly arrives late and rarely hands in his homework on time. His teacher usually punishes him for this with after school detentions or making him stand by the classroom door for long periods of time. He usually gets 0% on his exams, much to his mother's disappointment. He later tries to hide them, which has proven unsuccessful. He also doesn't like to study, which only further hinders his performance in school.

Nobita is terrible at baseball, and many other sports. He often lets his baseball team down, much to Gian's frustration.

shizuka-chan (しずかちゃん) is a smart and kind neighbourhood girl. She is, unlike Nobita, quick-witted and a very studious child. Shizuka takes several baths in a day due to it being her passion.

She cares for weaker people and neglected dolls. She wishes to be a nurse or an air-hostess when she grows up. Both jobs reflect her kind nature.

Shizuka loves her dolls a lot, to the extent that she loves them more than her own friends. In one episode, Doraemon, Nobita and Shizuka put her dolls in Nobita's race cars and started racing. Nobita's car crashed and the doll fell out, making Shizuka hate him temporarily and throw things at him.

She is also known for taking piano lessons so she can refuse to hang out with Nobita, which she dislikes because she likes the violin better. Her true passions are sweet potatoes and the violin, in which her playing is as atrocious as Gian's singing. Like Gian, she is also tone deaf to her horrendous violin playing. Sometimes, her practicing disturbs the neighbours, which is why her mother would get mad at her.

Nobita is terrible at baseball, and many other sports. He often lets his baseball team down, much to Gian's frustration.

Nobita is very dependent on Doraemon. He begs Doraemon for many things such as vengeance on his bullies and something better after listening to Suneo brag about his trips to Hawaii, games, and privileges.

As seen throughout the series, there are very few positives to Nobita.