>>23343570
Keilas Guile and Gryps 2 were used to target enemy millitary in the middle of battle.
Nyaan used the Yomagnus thing to nuke (fuck you, nitpicker) friendlies in a surprise attack.
And she didn't do it because of Kycilia's orders or because she has a grudge against Zeon, she did it purely on a chance that it would summon the purple hobo - an explicitly selfish reason and with no consideration of the consequences of her actions like a complete schizo sociopath.
She also, in case you conveniently forgot, murdered innocent and completely non-threatening scientists that worked on the installantion right before that.