It's October. If there isn't an event that depicted Halloween.EXE as a gigantic pumpkin head with a skeletal/zombehd body, then i'll be severely dissapointed.
<.<
Oh, right.
Have him/her related to your Net-Op in some way. For example, Roy likes green and small chibi things, so Bugman is green, small and chibi.
Or you could just go with the Gyroman approach and be a transformer.