Personal Immunity to someone else's powers as a Naked Advantage

[IndianaJoe3]

One of the characters in my group wants to make his Darkness not affect his teammates. Can they buy Personal Immunity to his Darkness as a Naked Advantage?

[Steve Long]

Well, you're the GM -- do you want to allow this based on common sense, dramatic sense, the special effects involved, and game balance? Generally speaking, characters can't buy Personal Immunity to someone else's power as a naked Advantage (it's Personal Immunity, after all, not just Immunity), but I'm sure we can all conceive of situations where we, as GMs, would be willing to allow it... and situations where we'd say "Absolutely not." ;)