Inuyasha: Serina and Suzuna

They're sisters who were raised in an village populated by ninjas before the demons attacked and killed everyone there including their father, because of that, they seek at Sango to teach the art of demon slaying. They explained that their village was overran with demons. Sango at first declined but eventually gives in and decides to show them some basic techniques. Serina is the older but weaker sister while Suzuna is the younger but more experienced in her ninja skills. This is from Episode 59.