1. A totally rad manga by Nobuhiro Watsuki and was originally featured in JUMP comics. It eventually became a CD book in Japan and then became a super tight anime series which is way better to watch uncut.
2. The main character in Rurouni Kenshin (a.k.a. Samurai X who's full name is Kenshin Himura (or Himura Kenshin, depending on where you're from). Rurouni means "wanderer" and the name Kenshin is derived from the Japanese word "henshin" which means "change of heart."
ah, yes, seta soujiro (from Rurouni Kenshin). a really psycopathic samurai who smiles constantly as a result of his suck-y childhood. he's actually based on another character in RuroKen, Okita Soushi (or Souji, whichever you prefer), who also smiles constantly despite his own problems.
Soujiro's the cute member of the Juppon gatana, and has the same voice as Omasu of the Oniwabanshu in the English dub.