Katsumi, Kat or Kitty for short, is a very bubbly person. She loves to sing and has a knack for learning things very slowly. When she so chooses, she can be very rude and mean, but that hardly ever happens.
Kat carries a small pistol in her bag, just in case she needs it. She's never used a gun before though.
Katsumi's parents thought she was a troublesome child, even though she wasn't, so they abandoned her. She went to an orphanage where she met Kitsaku. They became immediate friends until Katsumi got adopted into a new family. Her new family, the Hiruganas, treat her with respect. Years later she met back up with Kitsaku and now they live together in a small house.