re: unanswered hs questions: i was just sad we never found out what "playing the rain" meant :(

Curiously, given that a major part of Rose’s Character Arc revolves around refusing to follow her quest and the doubt and wonder of what her Quest would’ve been like and how she would’ve been able to fulfill it, Playing the Rain is a rather straight-forward thing that’s explained extremely early on.

JASPERSPRITE: Rose im just a cat and i dont know much but i know that youre important and also you are what some people around here call the Seer of Light.
JASPERSPRITE: And you dont know what that means but you will see its all tied together!
JASPERSPRITE: All the life in the ocean and all the shiny rain and the songs in your head and the letters they make.
JASPERSPRITE: A beam of light i think is like a drop of rain or a long piece of yarn that dances around when you play with it and make it look enticing!
JASPERSPRITE: And the way that it shakes is the same as what makes notes in a song!
JASPERSPRITE: And a song i think can be written down as letters.
JASPERSPRITE: So if you play the right song and it makes all the right letters then those letters could be all the letters that make life possible.
JASPERSPRITE: So all you have to do is wake up and learn to play the rain!
JASPERSPRITE: Does that make sense rose sorry i disappeared for so long.

Obviously, the ‘Letters that make life possible’ means the 4 DNA thingies, GCAT. Jaspers implies that Rose should be able to see a pattern in the way the water falls as if they were the strings of a violin, and the Song resulting from this would be a DNA Sequence that’d bring Life back to her Land. Given Rose’s the Seer of Light, a Quest revolving around her being able to identify patterns in her light-colored rain and ‘play’ them as a Song is definitely fitting. But also too ribbon-wrapped and easy for Rose to take seriously.