I would have to say my adventure would be the Sengoku era, very much like the Anime Sengoku Basara. I am really into swords, katanas, or any weapon medieval and I would love to be a female samurai conquering lands of that time.
But I can not do it alone...this will be the ones I would take with me!
Neliel Tu Oderschvank - Bleach
Vash the Stampede - Trigun
Neko - K
Sasuke Sarutobi - Sengoku Basara