A younger brother is a male sibling who is younger than another sibling. In families, younger brothers often look up to their older siblings for guidance and support. They may share interests, play together, and learn from each other, creating a bond that can last a lifetime. Younger brothers can have a variety of personalities, from playful and energetic to quiet and thoughtful. They may also have unique roles within the family, such as being the "baby" of the family or the one who brings humor and joy. Relationships with younger brothers can be both challenging and rewarding for older siblings.