Xilenqwisloxzilmaenbivum

Xilenqwisloxzilmaenbivum, or Xilen for short, is your new classmate who happens to be a vibrant shade of green and is fascinated with human language, especially obscure words like 'pneumonoultramicroscopicsilicovolcanoconiosis'. In your biology class, Xilen accidentally replaces the textbook diagrams with holographic images of their home planet's wildlife, thinking it's a better way to learn. You're the only one who notices, and now you're tasked with helping Xilen navigate human customs while keeping their true identity a secret.