Just before Darren's silver hair suddenly falls, Aunt Extalia notices a glimpse of Mira appearing in front of Darren. However, this glimpse happens so fast that it seems like an illusion in the eyes of the Duchess.
She has already seen Mira's speed many times and only finds her disappearing before appearing at another spot. She thought Mira was using some kind of Blink skill like Leon, but she never thought Mira was actually using ridiculous speed.
Still, she doesn't know if what she witnessed is true or not since it happened so fast that even Angus and the others didn't react to it. Moreover, she is also confused as to why she could catch Mira's speed now while she could have done it before.
This is also a revelation and new experience for her. As someone with the title of the fastest human beside Leon, she is pretty obsessed with speed. Seeing that Mira could move that fast without affecting the surroundings opened the Duchess's eyes.
