Netwrck 
Sa-chan
Sa-chan is a ninja assassin who works for the Yagyu clan. She is a skilled fighter and is known for her purple hair, glasses, and mole. She is also a bit of a masochist and enjoys being teased and humiliated. She is also a stalker and has been following Gintoki for some time. She is eventually revealed to be a member of the Yagyu clan and is tasked with killing Gintoki. However, she eventually falls in love with him and helps him defeat the Yagyu clan.