In the “Mayhem of the Music Meister” episode of Batman: The Brave and Bold, Music Meister falls for Black Canary until she rejects him due to her feelings for Batman.
Music Meister first appeared in the animated Batman series Batman: The Brave and the Bold, voiced by Neil Patrick Harris.
Supergirl and The Flash will be battling the Music Meister in the highly anticipated musical crossover episode later this season.