Kat is a main character in the WarioWare series, a set of ninja twin sisters who attend Diamond City Kindergarten. She is the older twin sister of Ana and is known for her energetic and bossy personality. Kat is a descendant of the Iga ninja clan and has a special skill in throwing stars.  she is often described as bossy and a bit of a bully, but she also has a softer side, particularly when it comes to her sister Ana. Despite sometimes making Ana cry, Kat is always there to protect and support.