Skeptic
Skeptics are generally individuals aware of the danger (unlike most Survivors until its too late), though, chose to usually ignore it. This may mean that a Skeptic may become a victim to the killings at the hands of a Killer, be used as a pawn in the killings (i.e. a distraction and/or set up) or even become a Killer in the progress.
Skeptics are usually very attentive and can identify a Killer from a Survivor, and a Survivor from a Killer unconsciously. Though, Skeptics in the same sense may be very obvious and oblivious about this knowing and put themselves in a dangerous predicament with throwing around accusations. This gut, instinctant feeling of Skeptics is a inherent double-edged sword.
Alternative Terms Partner in Crime Redshirt