Katana was hatched at an unspecified time, though it is known that it was at some point during Japan's feudal period. Most likely she was trained in Bushido and learned to wield a Japanese sword, a katana, from which she derives her name. Several decades after her hatching, Brooklyn arrives during his TimeDancer travels and the two gargoyles eventually decide to become mates. Katana continues on the quest with Brooklyn to return to his home from that point onward. She and Brooklyn will have at least two biological children: Nashville and Tachi, and she will become a part of the Manhattan Clan after Brooklyn's return to the Eyrie Building.
Almost nothing is known about Katana's physical features, though as a gargoyle of the Ishimura Clan she likely shares some of the regional anatomical peculiarities common among that clan, such as black hair, paired horns, and a reduction or increase in wing, finger and toe digits. This is only speculation however.