Ep #29: the handler's ringing laugh followed by an announcement and a swift change of clothes.
Ep #31: the captain instructing her women aboard the Devil Star, and hailing Nambu in the guise of Anderson's secretary.
Ep #32: in another civilian guise, she offers hospitality to Jun and Jinpei while commanding her men behind the scenes. As usual, the disguise involves putting on a sweet little voice; note how she says "nani" to them, first as part of the disguise, then as herself.
Ep #46: looking unusually glamorous, Katze drops in for a smoke at the house on someone who just let a renegade Galactor get away.
Ep #86: not really the woman captain but Katze posing as a civilian again, probably in female form: the pretty young lady who offers to show the two ant-ologists (Ryu and Jinpei in disguise) around the area, while at the same time keeping an eye on a Galactor operation.
Ep #102: the Galactor captain gruffly announcing herself to the "doctor" whose practice hides the telescope she uses to spy on Nambu.