Ollie was originally selected for the Reactor mission as well! I'll add him under Monika here shortly.
I have some codex details to get to today, and another little addition that will add some plot intrigue. But all in due time over the weekend!

As for names regarding exotic effects, Nightmare is the one for weakness to Dark, and I believe Zombie will be the one regarding weakness to Holy. 

Or we can totally call it "Vampire." Hah!