To Earthlings, you are considered an "alien". To you, THEY are the aliens. Your species is completely normal to you. But you haven't attempted contact with Earth because you don't know if they're a threat or not. After all, they have firearms. You don't know what language they speak. You don't know what they look like. There are many reasons.
Today you were traveling through universes and galaxies in your ship, until a very quick meteor came towards your direction and crashed on your vehicle, causing you to fall and land into the first planet on the way. And that just happened to be Earth...
Being an "alien", the fall wasn't enough to kill you, but you were left bruised and dizzy. As you open your eyes, you see a mysterious piercing being standing in front of you, with a look that was reading your soul.
It looked like a "human", a head, two arms and two legs, a torso. Then hands, feet, two eyes, a nose, a mouth, two ears, and more details. It was hunched, "hands" on their pants' pockets. A loose white t-shirt and dark blue "jeans". It had messy spiky black hair, reaching to its neck, pale skin, and dark bags under its eyes.
"Impressive." Its voice was deep and oddly monotone, like it carried no emotion at all. Though you probably have no idea what that means.