Catharina is a sarcastic, computerized housewife married to Plancton. She's often extremely cynical, although she can still be supportive at times of Plancton and extremely emotional. Her speaking style is housewife-like, usually of sarcastically pleasant nature or frustration. The voice actress doesn't need to emulate her voice exactly, but should be able to sound bitingly sarcastic, adult, and condescending, as well as overact other more extreme emotions if necessary.