Let's talk self harm and all the dark stuff.
Not everyone cuts themselves when they're depressed. Some may want to ramble to themselves, or even possibly starve themselves. As sad as it sounds, I know the character may be depressed but a lot of people handle it differently. And if you're doing it just because you think it's "cool" then shame on you. Depression and self harm is a serious topic so don't just have the character self harm for some little reason! If they have a loving family then they're fine! They still could have depression but at least have a reason.