Yep! Gatts from Berserk. The sword is 6.5 feet long and is made entirely out of duct tape. The core is a 6 foot bo (martial arts staff weapon). The knob at the end and the hand gaurd are large pieces of foam that were made quite sturdy by wrapping in three layers of duct tape. And the sword is two pieces of cardboard from a bookcase box , also covered in two layers of duct tape.
Another JAC member (Japanese Animation Club
http://jac.anime.net/) apparently had someone make him a sword out of sheet metal to be Gatts at a the chicago Con two summers ago. So I guess that one-ups me.
The belt and cloak-pin are cardboard (used up an entire permanent marker coloring it black), and cloak was made by my wife, and the shirt and pants I got at the thrift store so I could cut them up as necessary.
The cloak was reaally heavy and was choking me all day. I really can't figure out how people wear cloaks without it yanking at their throat. But the fabric was pretty heavy.
The next year after that I trimmed some fabric (actually the cloak was hemmed up 1.5 feet in that picture because it was too long) which made it a little lighter, and I made a sword holder. To hold the tip, I used a corner cut from one of those bubble-wrap lined envelopes, covered in duct-tape, and attached to my pants' belt-loop via a 3 foot line duct-tape (I figured duct tape would be far sturdier than string), so that the tip-holdster would hang just below the cloak line, and the tip of the sword would fit into it. To hold the top part steady, I took a clothes hanger and wrapped it around my neck (with some padding in the front), and made a tiny hole in the back of the cloak for the hook-part to stick out. Then I could lock the handle of the sword into the hanger-hook. That worked quite well, except of course I had yet another thing tugging at my throat all day. I don't know what kind of contraption gatts really used. I have seen some pictures where the dangling point-holdster hangs below the cloak, so I know I have that part right. But I don't know what he uses to hold the top in place. I also tried creating some boots. I was hoping to find some large boots at a thrift store to cut up and use, but never did, so I ended up just making big cardboard things to place ontop of my shoes. They looked ok from a distance, but weren't really great, and kinda ripped themselve apart after a while.
I never won a first place at a costume contest with it though. But I did win second twice.