You're an awesome Beholder, but not much tops Velah.
And yes, Cydonie is a blue dragon, and formerly one of Velah's protogées. You can read part of her and Velah's backstory here.
Also, Velah shows that alignment is fluid in Eberron. While a red dragon, normally always chaotic evil in other settings, she was working toward saving the world. She just did not care much for the mortal world, only her own.