Originally Posted by Spazmodic
BRS was based off Miku Hatsune
Originally Posted by Anmanda
That's not entirely true, BRS isn't related to Miku in any way, they just happen to have a similar hairstyle. Miku sings the BRS song, that's is, she's not BRS in any way/BRS isn't based on her ^^;
You're Kinda right, I'll link for more information for you.
Scroll down to the bottom.
Edit: Oh my, seems it already been answered, but I will keep the link up just incase people want to read the history behind Black Rock Shooter.