Well, in The Neverending Story, there's a girl known as Moon Child. She plays a very important role in the story. The whole story is filled with fantastical elements and her character is sort of like a symbol of hope and the magic within the world of Fantasia. She has a connection with Atreyu, the main character who goes on a great adventure. Her presence adds a lot of depth and mystery to the story as it unfolds.
The girl in 'The Neverending Story' is not clearly specified as the main focus is often on the boy, Bastian. However, there are female characters in the story's world. For example, there are characters like the Empress who play important roles in the fantastical world of Fantasia that Bastian enters. But without more context, it's hard to pinpoint a single 'girl' as the definitive one in the story.
Well, it's hard to say for sure. There could be names like 'The Endless Adventure' or 'The Perpetual Storyline'. Different authors or works might give it various names to convey the idea of never-endingness.