Noriko is a villain in the Usagi Yojimbo comics. She is Tomoe Ame's cousin but it is later revealed to be her half sister.

She ran a secret gold mine with slave labor and worked the slaves to death. If any slave slowed down, she would behead a slave to threaten the others. She enslaved Tomoe and Usagi in her plot, but they later escaped with the slaves to foil her plans. Later she tried to blow up the mine with the slaves inside it when all the resources were gone.

Unlike the other villains, she enjoys humiliating defeated opponents and she killed her father.