Goemon Hachisuka
While looking like a child, her age has not been confirmed, and it is suggested that she might be older than she looks.
She is a ninja who was once Kinoshita Toukichiro’s companion until he died in the opening of episode 1. She now serves as Sagara’s unofficial bodyguard. She has a habit of stuttering when speaking which is why she pauses in between sentences when she is talking.
(Source: ANN)