I definitly vote Samerai... like Enzero92 said, "its in League with the whole Ninja theme" If Ninja are nerdy, Samerai shouldn't be easy to convert.
Also Samerai are Japanese, and i don't know about anyone else but when i think Japanese, i think of someone who insanly smarter than me, and smart generally=nerd.
Also Samerai are Japanese, and i don't know about anyone else but when i think Japanese, i think of someone who insanly smarter than me, and smart generally=nerd.