I don't mean 'scary' as in overly brutal or stereotypically violent, but with nagisa it just comes off so natural,, like he gives off that vibe that you can't get away.. kinda like trapped in his gaze. The fact that when he finally manages to snap after a LOT of provocation and would literally kill someone yet in the most natural & nonchalant manner despite apperaing to be really 'vulnerable' and 'harmless' makes it all the more uneasy/unsettling/eerie. He wouldn't do it out of malice or anything; it's literally simply in his nature and it's been confirmed he has that 'bloodlust talent' within him.

Damn i didn't mean for this to get so long but anyway that's just my 2 cents X)

He just straight reminds me of a demon right here😈