Giyan

Takeshi Gouda (Japanese Kanji: 剛田 武, born June 15, 2001), more commonly known by his nickname Gian (Japanese: ジャイアン, translation of the English term Giant), is one of the main characters in the Doraemon series.
He is recognized by his large build (might partly be contributed by obesity), as well as mean, selfish and violent manner. He "rules" the neighbourhood with force, often to the physical expense of other children, especially Nobita, who often resorts to asking Doraemon for gadgets to get even on him. In addition, he has a tendency to rob things from other children, usually Suneo, who offers himself to be Gian's sidekick in most occasions.

He is known for his confidence in his terrible singing voice, though he considers himself a great singer. But in some episodes when his voice is recorded and he hears it, denies it being his voice and threatens to beat up the person who sung his songs in a bad way. He regularly subjects the neighborhood children to horrendous singing recitals, which is sometimes combined with his equally bad homemade dinner and his atrocious fashion sense. His favourite food is Stuffed Capsicum. He also frequently steals other children's toys and books under the pretext of "borrowing" them, unless the toy is damaged. This is how most fans considered Gian to be the antagonist of this show. However, he does not hesitate to help Nobita and his friends when they are in real trouble, which often occurs in the movies.

Several of the stories revolve around Nobita and his friends' efforts to avoid Gian's concerts, and several chapters summarize his friends efforts to avoid visiting Gian's house on his birthday because of his selfish nature. After reflecting on one event about his birthday, Gian thought of himself why he wasn't popular among his peers. After getting a lecture from Doraemon to see what an unruly character he is, Gian realizes that he should have been a better person and he begs Doraemon to give him another chance. However, things didn't go exactly as planned when his friends at school or at the streets mock him to see how weird Gian was acting and get kicked by Suneo after learning his attempt to become gentle to his peers. This led him to lose control of his temper and start attacking his friends again.

Although he bullies the other children (mostly Nobita), he is terrified of his mother, who runs the local grocery store, tells him to deliver many goods, a fact Nobita and Doraemon sometimes use in their favor. He founded his own baseball team named after himself. Although Nobita is often blamed for the losses against the baseball team's rival, the "Tyranos", Gian still forces Nobita to play because they do not have enough players.

Gian is probably the most athletically talented among the kids, and he's also the captain of the local baseball team — The Giants. Because of the poor skills of some members like Suneo or, more significantly, Nobita, the team often found itself at the bottom of the league table. Defeats often lead to Gian's abuse of his teammates.

Gian in the new generation

Another prominent hobby of Gian is singing, in which he thinks himself proficient, but actually very appalling, to the point that people often pass out upon hearing his singing. Nonetheless, he manages to "convince" the neighbourhood to be his concert audience,
and even force them into praising his singing

Source:Wikia and Written by Adnan.