This is all four of them--Haruka, Michiru, Setsuna, and Hotaru--together.  I liked it because it presented me with a challenge to put the four of them together in a way that would seem feasible.  It is my desire to one day spiffy it up with Paint Shop Pro or Photoshop, but for the mean time, this'll have to do.  --Mina, 02.11.12