The main character is the little soldier. There may also be other soldiers, perhaps his comrades, and maybe an enemy or a commander.
In 'the brave little kite story', the central character is the brave little kite. It's possible that there are additional characters. There could be a group of children who are excited to see the kite fly. There might be a strong wind character, which could be personified as an antagonist that the little kite has to battle against. There could also be other kites in the sky that the little kite looks up to or tries to emulate, and they all contribute to the overall plot and the little kite's development of bravery.
I don't know since I haven't read it, but there could be a main character which is the brave little soul. Maybe there are some friends or foes around it.
The main character is of course the brave tin soldier. He is the one whose journey we follow throughout the story.
Perhaps there are also some friendly characters in the story, like other birds or animals that the parrot interacts with. They could play a role in either helping the parrot or depending on the parrot's bravery for protection. So they would be part of the main characters in the overall context of the brave little parrot story.
The main character is of course the little bird. It's the one that is brave, so the story likely focuses on its actions and adventures.
The main character is the little mouse. There may be other characters like a cat or a big animal that the mouse has to face, but the focus is on the brave little mouse.
The main character is the little toaster. There are also other appliances like a vacuum cleaner, a lamp, and a radio.
The little tailor is the protagonist of course. Then there are the two giants who he meets during his journey. These giants are big and strong but not as smart as the little tailor. Also, the king who tries to test the little tailor and his daughter who the little tailor finally marries are important characters in this story.
The main character is, of course, the brave little tailor. And there are also the giants that he encounters on his adventures.
The main character is obviously the little parrot. It's the one the story is named after, so it's likely to be the focus.