The first fighting game I played was Soul Calibur 2 where I fell in love with Nightmare and all of his badassery. When I got to playing Blazblue, I started as Ragna (for obvious reasons) but as I got better and actually tried out other characters, Hakumen somewhat reminded me of Nightmare and I guess that's how he became my main. For Mu as my sub, well, when my friends and I started out, we decided who would learn what characters (which we have not stuck to), but none of us knew what Mu was like, so I was like "I claim dat ass!"