Suzume is a kunoichi of the Iga House and known to be the best ninja in JAPAN. She is also stronger than Inukai, who is the head of Iga House. 

Suzume has a natural talent that allows her to master ninjutsu without having to work hard. She has a 100% mission success rate, and has performed over 100 assassinations of important people. There were used to be people who see her as a rival, but so far none have defeated her. She gets easily bored from the lack of any sort of challenge.