A younger sister is a female sibling who is born after another sibling. She typically shares a family bond with her older siblings and may look up to them for guidance and support. Younger sisters often engage in various activities together, such as playing games, sharing hobbies, or participating in family events. In many families, a younger sister may have a unique role, often being seen as the "baby" of the family. This can lead to protective behavior from older siblings, like older brothers or older sisters. The relationship can be characterized by both companionship and occasional rivalry, contributing to family dynamics.