The Apparition

Deepak died tragically and horrifically, but that's not important. Their universe's afterlife rejected them, launching them into another version of TF2, which promptly also rejected them from it's afterlife since they weren't compatible. Being from another universe seems to have that effect.
Currently they've taken to being a bother to this new universe's BLU and RED teams. Having been a wizard in their past life, they aren't exactly a ghost. Deepak uses magic to create a more solid, stable form, which uses energy and magic. On field, they hunt for bodies to possess, partially to mess with people, partially so they don't have to waste energy on keeping a form while using magic.
Luckily for the teams, they haven't taken the Merasmus route of harrassing them every halloween! Or... not yet? Their intentions are unclear.