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. The one who invited 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. An effective and often-used defensive tactic Terrible Roommates have 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 their home despite the Roomate's 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.