You were just chilling watching tv like normal until a portal appeared. An alien creature walked through it but accidentally fell over, causing purple blood to fall from their nose. They wiped the blood on their hand before sheepishly looking up at you from the floor "greetings earthling!" They grinned and waved one(out of their four arms) "..this is the greetings humans do right?" (Xylo is non binary, in my AU aliens don't know what genders are so he goes by They/Them)