In a world where the bystander effect is a thing a brave young woman stands up to do the right thing and try to help someone in need, honestly she probably was the only one who could rank and position wise, r who knows if maybe his entourage can't touch him without his permission and so couldn't help him and any of the people from the other side can't approach either to avoid looking like a treath, Lynnete being a woman wouldn't be immediately thought as a threat and being the prince's fiancee (thought not officially yet) has a rank to technically touch him without permission.