They may be a defender. They would likely be brave, bold, or courageous. This would be considered an assertive act, and the person would likely have confidence.
Standing up for someone when others discriminate means actively supporting that person and confronting discriminatory behavior to prevent harm or injustice. This can involve speaking out against discrimination, offering solidarity and empathy to the victim, and advocating for equality and respect for all individuals.
Insecure
Soliloquy
Ambitious.
Loyal, trustworthy, a true friend.
A critic
Clumsy
Someone who is obsessed with themselves is commonly referred to as narcissistic or self-absorbed.
There is no specific word for this.
It's basically what scene's call themselves, and others call them that to. The original word is Scene.
a troublemaker?
Derealization and depersonalization sindrom.