An amanto who resembles a cat, Catherine initially appears to be a diligent worker at Otose's snack shop, striving to support her family. However, she soon reveals herself to be a thief. Despite her criminal past, Otose rehires her after her release from prison. She used to work alongside three others, whose roles loosely parallel those of Arsène Lupin, Goemon Ishikawa, and Daisuke Jigen. Catherine speaks Japanese with an accent, represented by katakana characters instead of hiragana, making her the only member of her former crew to speak this way.
Catherine's birthday is August 21.
