Re: Evil Fey
That's one of those campaign-dependent things, which is why you can't really just ask 'what's a fey' in HERO. You need to figure out what fey are, how they work, and what they do in your game, and build it from there. I've never really used fey (I don't find those mythos that interesting), but I generally go more 'aloof and indifferent' than 'capricious and amoral'. In other words, your PC complains about the issues of having a Secret ID and the fae responds 'And I'm supposed to care ... why?'.
Or alternately, 'Were you talking to me? You should stop doing that.'