Cathy Catherine's house is the residence of Cathy Catherine and her family. It is a big mansion located within Heartland City.

The mansion if full of cat shaped items and decorations. The mansion itself is like a cat's face. Cathy prepared a room to be the Numbers Club's headquarters, with researchers and big computers.

Gallery

Cathy's house in the manga.

Some handrails shaped like cats, pillars with cat drawings, and a cat picture.

A cat mosaic, another cat picture, and an electronic door with a cat paw-like knob.

The room prepared to be the Numbers Club's headquarters.

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