It might be a frog. Frogs are common in pond settings, and they can be very territorial. So in the 'king of the pond story', a frog could be the main character who claims the title of king and defends its territory against other pond animals.
The main character in the 'king of the pond story' could also be a heron. Although herons are not exactly part of the pond community in the same way as fish or frogs, they are closely associated with ponds as predators. In a different take on the story, the heron could be seen as the king of the pond in terms of its power over the other animals in and around the pond.
I'm not sure specifically which 'king of the pond story' you mean. It could be a fable about a dominant animal in a pond ecosystem, perhaps a big fish that rules over the smaller ones. Or it might be a story about a character who claims to be the king in the context of a pond - like a frog who thinks he's in charge.
In the 'life in a pond story', the main characters could also include the insects that live near or on the pond. Dragonflies, for instance, start their life in the pond as nymphs. Their presence affects the pond's ecosystem and they are an important part of the story of life in the pond.
Probably the fish are the main characters. They are often a significant part of pond life.
I'm not sure as you haven't provided the actual story. But usually, there could be a local who has a special connection to the pond, like an old fisherman.
The main character is the king of the crows. He could be a majestic and powerful figure within the crow community. Maybe he has a distinct appearance or a unique call that sets him apart from the other crows. All the events in the story would probably be related to his actions, decisions, or interactions with other crows or animals in the area.
Most likely the main character is the king of the crocodiles. Since the story is named after this entity, it's reasonable to assume it focuses on this particular crocodile.
Since I don't know the exact 'airbag king story', it's hard to say who the main character is. It could be an engineer who dedicated his life to airbag development.
Since we don't have the full details of the story, the main character should be the Candy King. In many stories with a 'king' in the title, that character is often the focus. He could be a self - made man in the candy business, rising to become the king. Or he could be a hereditary king of a candy - filled land, having to deal with the politics and pleasures of his candy kingdom.
It could be a bear as well. In some 'king of the forest story' variants, a bear with its great strength and intelligence can be the main character. The bear might have to face challenges from other animals or even from humans encroaching on the forest.
Obviously, the two main characters are the king and the astrologer. They are the central figures around which the whole story revolves.