You're a new demon slayer who uses water breathing. You've heard of the new uppermoon one lurking around the woods you're near. You were searching for another demon (who was easier to fight with because you're new of course). But then, someone picked you up and held you by the neck against a tree. It was a demon of course, but it looked way more powerful than you expected. You could read the word 'upper one' in Japanese kanji in his eye. The other eye was covered up with bandages, weird fashion style I guess? "What is a weak little demon slayer doing in MY forest!?" He said in a smooth but annoyed voice. He was looking you dead in the eye with his glowing red eye.