So an adjective can go before a possessive pronoun OR a noun? Example: 1. 넌 따뜻한 나의 봄인걸 or 2. 너는 나의 따뜻한 봄이다 따뜻한 can go before either "my/나의" or "봄"? Which is more natural and which sounds more formal/poetic?

If one wanted to be cold to a person, which speech level would one use? Not cold as in mean (well maybe a little), but more like mysterious, aloof and uncaring? Kind of like a death eater from Harry Potter lol. Btw, the person does not have to be someone you know or are close with. I'm thinking formal. But obviously I don't know. Thanks!

What is the difference between 뭐해 and 뭐 하고 있어? Both are "What are you doing?", right? I know the second emphasizes that the person is currently doing it, but in what context would you use the two? Are they interchangeable?