Imo its not just luck, the stilles are mana-sensitive, and more so than other birds has a heightened flight instinct when met with hostile/killing aura. I dont think it's purely luck that the stille appeared before wirbel and co after they were done in and calmed down. It probably felt safe...
Lmao mans turned into a mad dog.
@alacaelum also do you think its purely because of the master's soul/personality and magnitude of power?
I think its also connected to how they perceive him. Maybe this commander chick has no regards towards him as a person - only his abilities, and thats why...