Sissel is the main character of Ghost Trick: Phantom Detective, and is also the character that is controlled by the player. He died shortly before the beginning of the game, and turned into a ghost shortly after.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...