For my good friend, Marina the mako shark! The background is her Steam profile background, which looks amazing. Her outfit is a few of the newer cosmetics in TF2, as well as the Powerjack.

http://cdn.akamai.steamstatic.com/steamcommunity/public/images/items/96100/f400290347611bd57a63728d10bc87131ad0d8a9.jpg

it's not supposed to be a mermaid-type thing, it's a waist-and-up shot with the tail there for extra flair.

Moderate for bloody weapon?