Pretty Little Star

"Pretty Little Star" is a song composed by Nocturnal Jay.

Significance
The song is meant to be the musical representation of the lullaby that's heard throughout several episodes starting with Episode 7. When hearing the song, the melody directly matches with the lyrics shown. The true meaning of the song is illustrated better in Episodes 19, 20, and 21.

The full song can be heard during Episode 21.

Meaning
It's later revealed that the song is being sung by Mairin. It's a lullaby her parents sung to her when she was a few months old. Her excellent memory allows her to remember it. Her parents died when she was very young, prompting for her to be put into a foster home in the Johto region. She loves singing the lullaby to herself and she remains cheerful, despite all she goes through.

She was digging around one afternoon to find more things for a collection of artifacts she keeps. Suddenly, a purple tree stump sprouted from the ground. According to her, the stump "guided" her to wait for her "big brother" to find her. She would sing the song each night, as the stump eventually transmitted her lyrics to Ash's ears.

When Ash made it to Blackthorn City, where Mairin lives, she was guided to him and immediately became attached to him like a little sister. She taught Ash the lullaby, which the two of them sung each night at the tree stump.

As for the song itself, Mairin loves looking at the stars at night, and the lullaby shows her love for those stars, as she thinks about her situations. The lyrics have a very close connection with Mairin and what goes on with her.

Lyrics
The actual song composition itself doesn't have lyrics sung, but the following are the lyrics of the actual lullaby represented by it.
 * "Then, she saw a star in the sky that night. And it gave her life and it kept things right. Then one night, that star flickered as the rain poured. And the pretty little star didn't shine any more."

Composition
The song itself is in the key of A minor with a slow tempo of 53 bpm. Primary instruments include a music box, oboe, harp, and drumset. Eventually, the song transposes to the key of B-flat minor, adding in French horn, strings, and trumpet, the latter two joining the melody voice, representing the lullaby being sung with others. It begins and ends with the music box solely focused on and playing the lyrics, a representation of the lullaby being sung alone.

SoundCloud Link

 * Link to the song: "Pretty Little Star" on SoundCloud