Melanie Martinez - Pluto Lyrics Meaning

The song Pluto is about growing as a person and possibly rebirth like death.

This shown in lyrics such as "Pluto transform me, turn off my lonely I'll sit with my silence
Fix all my conflict Show me the demons I'm hiding" and also "I'm turning to expired routes
Help me move on" which shows Crbaby asking Pluto a god to transform them and make them less lonely and wanting change (move on) which helps prove my point that this song is about growth or wanting to change. This song can also be about rebirth because it has lyrics such as "I'll bathe in my ashes
Rise like a phoenix
Show me who I am becoming" which mentions phoenix's which are often attributed to rebirth, Pluto the name of the song is a god of death which can cycle back to the song death which is also about rebirth.