Arash is a really cool name! But I'm guessing you're not actually asking about the name. So let me try to explain it in a way you'll understand.
Arash is actually something called a proper noun. That means it's a special word that refers to one particular thing, like a person, place, or thing. Think of it like a nickname for someone, but instead of just being used by their friends, it's used by everyone who knows who that person is.
Now, if you're specifically asking about a person named Arash, then that's a different story. I don't know anything about them, so I can't really explain who they are. But I hope that helps you understand what a proper noun is!