I chose to draw them both in the Star Wars universe! Rhaegar was tough to conceptualize in this context. I don't believe he would be a Sith Lord. I had a friend suggest that I give him a white light saber like Asohka Tano to indicate he was neither Jedi nor Sith, but I felt that giving him a red light saber would be more aesthetically pleasing (and most color schemes for R+L are usually blue and red) so I went with red.