If a character is immune to events does that also include passive abilities? So for example, is the Red Viper immune to character effects whose 'static' ability reduces all characters strength by 12? Or is he only immune to trigger abilities that designate him as the the target?

Immune to passive events? I'm guessing you meant "character abilities" there?

If a character is immune to "character abilities," they are immune to all character abilities (triggered, passive, and continuous) - provided those a character abilities would affect the immune character directly (e.g., if a character ability says " players may not declare power challenges against you," the immune character could not ignore that limitation on the player).

Yeah I did mean character abilities. My apologies and thanks for answering my question.

We have all posted questions like these before. :-)