Well, El Cid has a basis in history. Rodrigo D铆az de Vivar was a real person, but the stories about him have likely incorporated fictional elements over time to make them more captivating.
I'm not sure specifically what 'cid kavin fanfic' is about as it could refer to various things. It might be a fan - made fictional story related to characters named Cid and Kavin. Maybe it's part of a particular fandom where fans create their own stories involving these two.
In any family story, including the Cid family's (assuming we're talking about a normal family), inheritance and family traditions are often key elements. For example, if there was a special family recipe or a particular way of celebrating holidays that was passed down through generations. Also, any significant events like weddings, births, or funerals play important roles in shaping the family story. These events not only mark important milestones but also affect the family dynamics and relationships. They can bring the family closer together or cause some rifts, depending on how they are handled.
I'm not sure which specific 'cid family story' you are referring to. There could be many families named Cid. Can you give some more details like their location or a particular event related to this family?