In a way yes but no, 你 might be called a poser and will probably have to try to look mere 情绪硬核 to prove you're emo. Also 情绪硬核 isn't about self-harm 或者 being depressed all the time. At first 情绪硬核 wasn't a culture, it was a type of music.
Depends on what 你 mean 由 "emo." It originated as an insult to overemothional people, but then evolved into a style of music. So if ur talking about the insult, yes. If you're referring to the 音乐 genre, of course
