Personally, I just think he looks like the Smiling Face with Horns' pissed off cousin. Alternate names include Sad Devil and Purple Goblin emoji, although (again) it's only purple in the iOS version.

'Pretty Little Liars' Season 6 Episode 13 Recap: A Is Back, and Is Now a Devil Emoji Mehera Bonner January 26, 2016 - 4 min read ...