This may be a bit of a trivial thing, but I'd like the legacy system to have the simple feature of giving the players the chance to explain their legacy and the relationships within that legacy through simple text. Even if you can't show off your legacy to others in-game, I think it'd be a nice to get that option.
Anyway, I made Darek, my merc, and Sula, my smuggler brother and sister. I thought it'd fit, besides, both have a filthy mouth. My guardian Nural is linked as a (friendly) rival to Darek. I'd like to imagine Nural was taken in by Darek and Sula's parents at a young age and developed a friendly rivalry with Darek, until Nural was taken away by the Jedi Order.