Hi Ririka! I got into Samurai Troopers when they were shown on t.v oh so many years ago. Collecting all of the DVDs as they were being released is what brought me into the world of anime!!
To answer the questions: Rowan/Touma is my all time favorite Trooper!! (Besides, I think my icon is a dead giveaway!!XD)
My favorite villain is Dais. Why, I don't know. *grins*
Though you didn't ask I am going to share any way! Seji/Touma, or Sage/Rowan depending on your preference, is my favorite pairing. Oh the fan fics I have on those two!!