Bouquet's shadow is Hippopotamus. Hippopotamus may be weak and somewhat cowardly, but he has the ability to shapeshift, sometimes using that ability by wrapping around Bouquet to provide her with a disguise. Hippopotamus later gains the ability to copy the attacks that he is hit by. In the second series, he and Bouquet have been given the ability to merge with Blue Dragon or Saber Tiger to provide armor and make them appear in near-full form. He also worries for Bouquet's well being whenever a battle begins. from wikipedia
A Beautiful girl with a shadow hidden somewhere. She is popular with the boys, though because of that girls are jealous and loathe her. She absolutely hates men due to a certain incident in the past. She has feelings for Ayumu that go beyond friendship.
Jessie is a 15 year old girl who has a special type of blood that heals every illness. She was trained ever since she was a little girl at the caravan. She heads to her district to start her work as a docter. She falls in love with Eagle-san more into the story. She also saved his life by giving him, her blood.
Ri Seiryuu, who is found on a little rescue boat, along with another shipwrecked man, is more than just a cast away. Rescued as a little boy, by a fishing boat, the crew as well as the captain notice that something is wrong with the boy. He never smiles and behaves odd towards others. The Captain of the fishing boat decides to try an experiment with the boy. Until he smiles, he is not allowed to get out. Seiryuu is forced to live seperated from the crew. The room, he gets locked up in, is small but full of books, a TV and videos. Information about mankind and how it behaves on the planet. He grows up in a room filled with knowledge about killing, destroying and hate, and is kept there until his body has matured.
Takeshi, usually known by the nickname "Gian" (ジャイアン, Jaian) from English word "giant", is the big, strong, and quick-tempered local bully. He is known for his confidence in his terrible singing voice, though he considers himself a great singer. 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. 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 realize 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, 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 and Suneo still force Nobita to play because they do not have enough players. Gian also has a younger sister named Jaiko, whom he adores. (Source: Wikipedia)
Nobita is one of the main characters of the Doraemon series. A fourth grader in Tokyo and only child, he is the quintessential flawed protagonist. He is lazy, bad in sports, bad in school, plain as a gray rock, and to top it off, all too unlucky in his (mis)adventures with Doraemon. However, his struggles to overcome his flaws are what drive the storyline.