Swindler: the guilty sinner theory (or poor victim) Okay, so a few people have commented on the tatoos on Swindler's back in the ending. I'd like to elaborate on that. The mouth (one of her tatoos) is associated with speech and can either be used the right way or the wrong way. Suppose there was a scenario in which Swindler told the truth when she shouldn't have? Okay so now imagine that it was her mouth that led to everybody around her dying (like saying something she was not supposed to say)? That may explain why she subconsciously seeks out for her own death (GreedyHorror's theory) whilst at the same time wishes to save people in order to compensate the lives lost due to her past blunder. 

She harbours deep remorse, hence why she wishes to die and panics over situations involving life and death.