The answer is: Miriam

Ex 15:20 - His bother was Aaron

Miriam isn’t just Moses’ sister; she plays a critical role in the early narrative of Israelite history. Her story pops up again in key moments, showcasing her leadership and tenacity. For starters, she’s a prophetess—a pretty big deal for a woman in ancient times! After the miraculous crossing of the Red Sea, the Book of Exodus highlights Miriam leading the Israelite women in song and dance, celebrating God’s deliverance. Imagine the energy of all those women dancing with tambourines—talk about a joyous celebration!

It's also fascinating to consider her relationship with her brothers, Moses and Aaron. While Moses gets top billing as the famed lawgiver, and Aaron as the first high priest, Miriam was active behind the scenes, often mediating between God, her brothers, and the Israelites. She’s a reminder that although some contributions might not see the same spotlight, they are just as essential.

Interestingly enough, Miriam faced her own challenges. In Numbers 12, she criticized Moses and, as a consequence, was struck with leprosy for a time. This serves as a lesson on accountability and humility in leadership—I mean, it’s not easy being in the shadows of such legendary figures! Plus, after her healing, the Israelites continued in their journey for 38 years, illustrating the lasting importance of her role. So, Miriam is not just a sibling; she’s a pivotal character embodying the dynamic complexities of family and faith during transformative times.