The Terrible Roommate

A roommate Downward Spiral.

The one who's fun at first to have around in the house, but then gradually becomes more of a burden to those around them as time goes on. Whoever let them into the house (likely the Main) will soon regret it and might have to be the one to tell them to leave due to their awful personality. A good and often used defensive tactic Terrible Roommates employ is a Sob Story that ends with them having nowhere else to go but the Main's home, developing the dilemma that causes the Main to not be able to remove them from despite their terribleness.

A Terrible Roommate has very high chances to be involved in a Sick and Bell plot. If they are, they might not be too fun to be around like typical Terrible Roommates as they are injured or sick and may constantly complain about their current status.