Perhaps the quiet girl is having vivid dreams or nightmares that make her murmur. Another possibility is that she's trying to express hidden emotions or thoughts that she can't do otherwise.
It could be that the girl has unresolved issues or is in a state of deep thought, causing the murmuring. Or perhaps it's a plot device used to add mystery to the story.
A quiet girl in manga is often depicted as shy, introspective, and not prone to speaking up easily. She might have a rich inner world that's only revealed gradually.
A quiet girl in manga often has a reserved personality. She might not be very talkative and prefers to observe rather than actively engage.
There's 'Your Lie in April' where the main girl is quite quiet and there's a boy involved. The story is really touching.
One manga that comes to mind is 'Silent Voice'. It has a main character who is super quiet and her journey of self-expression is the core of the story.
There were many poems about the gurgling of the stream, such as "The deep mountains cut off people, and the stream gurgled to connect the stream spring" in "To the Monk Longgu" and "The sound of the stream patters from the reeds, and the stream gurgles white sand" in "Autumn Night Huaming Ben". In addition, there are also "Sou Song on the rain, murmuring stone in the middle" in "Dasan in the past deep forest dense bamboo Dengdao winding forty or fifty miles to Huangniu Ridge to see the yellow flower river" and "Lang Tao Sha Ling·Rain outside the curtain murmuring, spring waning" in "Lang Tao Sha Ling·Rain outside the curtain murmuring" and so on. These poems vividly depicted the scene of the gurgling stream, giving people a fresh and peaceful feeling.
Here are some sentences describing the babbling of a brook: - The clear stream played, meandering and trickling, rolling up and down without stopping, gently singing a gurgling song. - The stream was gurgling, carrying fallen leaves and flowers, as well as clean sand. It flowed through the mountain stream, gently spiraling, merging into the lake and sea, and then separating again. - The stream in the forest was murmuring, and the grass on the slope was green. - The stream had already flowed for a long time. Patter patter patter. It flowed past the Reef Tribe. The water hit the " obstacles " on the water. " Thump, thump, thump." The water flowed to the side of the cliff. It turned into a waterfall and jumped down. - There is a stream in front of my hometown. Standing on the bridge and looking out, the water of the stream is really beautiful. Under the sunlight, the silver light sparkles, the waves sparkle, and the water gurgles. It is beautiful and moving. - The mountain was surrounded by clouds and mist, and the stream was murmuring. Under the rapid waterfall and the flying clouds, the mountain scenery was so beautiful. While waiting for the TV series, he could also read the exciting content related to this site!
It could be that the character undergoes a series of personal challenges and makes poor choices that lead to this transformation. Or perhaps there are external factors like peer pressure or a desire for attention.
It could be due to various reasons, like traumatic experiences or bad influences.
Maybe she's had a long day or didn't get enough sleep. Could be stressed from something going on in her life.