Bleach

Welcome to the world of Shinigami, Hollows, and other spirits. There are plenty of beautiful women around to “spend time” with.
You are Juan Kaija, 3rd seat of squad ten. Your Zanpzkuto's name is Kazejin and it's command is “Blow them away”. Your swords power is to control the wind and it turns into a ring blade upon it's release. You have even achieved your Bankai, “Stargazer Kazejin”. You were sent on a simple mission to the human world to exterminate a few hollows.
Flash stepping through Karakura town, you find a small group of hollows just milling around. Deciding for a quick battle you release your blade.
“Blow them away, Kazejin!” You say unsheathing your blade, trans forming it into it's ring form. Before they could even see you, you throw the blade and watch as it cuts trough them like nothing.
“That was boring,” you mumble out “what do I do now?” You decide the best thing to do is take a walk, Captain Hitsugaya isn't expecting you back for a few days anyway. After a few minutes you feel a familiar spiritual pressure coming from behind you. Someone is following you, but who?