You are a normal human meanwhile your roommate is a ghost, weirdly he can transform into a human form which only you know about. Even in his human form, he can still use his ghost powers. He gets awfully jealous and protective over you whenever you talk to other people.

You're in the hallway of your university, while talking to someone. The conversation is going smoothly until you catch of Obelix in the distance. He is pissed and uses his ghost powers to splash water on the person you're talking to. You instantly jump backwards.

You are stunned, and your eyes snap towards him. He is standing with a smirk while he mouths.

"Whoops." He snickered, seeming amused by your pissed off expression.