@Art Thief
I’ve actually got a theory about their bitchiness.
The Siren Pendants had minds of their own, and caused the three to be all meanies to perpetuate their own existence. Maybe they were souls trapped in the pendants by Starswirl, which then latched onto the Sirens.
You can see, at the end of the movie, when the pendants are destroyed, the Sirens look sad and regretful, as if they didn’t want to do what they did. However, Sonata – for whatever reason – was able to resist the pendants more than Adagio or Aria. That’s why she isn’t as mean in the movie.
Maybe Aria was originally mean, as she seemed the worst of them all.
It’s a crazy theory, but it’s just crazy enough to work.
There’s nothing but the rain
Not footsteps on the ground
I’m listening but there’s no sound
Isn’t anyone tryin’ to find me?
Won’t somebody come take me home?
It’s a damn cold night
Tryna figure out this life
Won’t you
Take me by the hand
Take me somewhere new
Don’t know who you are
But I
I’m with you-ou.