We have Arch here, who is a figment. As in a figment of your imagination.

The chap in the center there is one who is infected. Its only a partial infection though, as he hasn't gone though everything yet. Eventually anyone infected by Arch begins to wear a mask like the one he wears and they even dress similar... But the catch here is that arch likes mind games.

As he knows people are out to get him, The infected are capable of returning to their normal lives for a while only displaying infection signs when Arch wants them to. Partials however are people who get caught between limbo and their minds blow up.

A person in this state is basically a crazed zombie. Immune to pain and even deplaying effects that are much greater than human.

the fully infected though are capable of becoming so posessed by arch that they can even be decapitated and live for a while. Some of them that should have died from thier wounds are also healed up as Arch has an extensive medical knowledge as well. (possessing doctors.)

If a person who is infected is decapitated, a faint image of a mask, with a set of glowing eyes and mouth appear where the head should be.