Maestro’s father is the Toymaker, one of the most powerful rivals of The Doctor. But he did not treat Maestro well at all, neglecting them in search of their own power. They were created to be music itself, being made of it and needing to consume it. As they got older, they made their own conductor’s wand and learned how to properly consume music. They have to play an instrument or sing, then strands of measures and notes will attack the person they’re targeting and steal the music from their soul. Once all the victim’s music is extracted, the measures go back in and around the tip of the wand, where they suck it off. The average person lasts about a few hours before Maestro gets hungry again, but the more talented, passionate, or gifted someone is for the art of music, it satisfies them for longer. Music tastes like whoever sang it to Maestro, so everyone is different. After someone’s music gets sucked out, their ability to use their instrument is taken away and their passion for music that they once had is gone. This may also put them into a depressive state or instantly kill them depending on how much music they have. However, they are only concerned with stealing all music and becoming the most powerful- and only- musician in the Universe and killing The Doctor in the process. Just to spite their father. They have a son themselves. His name is Harbinger and he calls Maestro Dad. However, this son is technically not real, just like one of The Toymaker’s toy drones. They can summon and whisk them into a pocket dimension at will, only leaving a decoy pile of clothes behind. They also have a tuning fork they can use to detect where music is coming from. They live in the basins of pianos, shrinking down to fit inside them. Depending on who they want to steal from, they can also teleport between them. The moment someone pops the lid open, they grow back to normal size. They can take people into the piano with them, but it is difficult and wears them out for a few minutes.