If anyone ever rooms with Sanzo it 's usually either you or me , and the only reason Gojyo 's ever really done it before was when I was hurt bad and you needed to stay with me . " Hakkai 's smile never left his face but Goku could have sworn he was starting to look a little nervous .

Question: Why are the potential roommates of Sanzo being limited ?
Answer: Sanzo is not looking for a roommate .Sanzo is tough to room with .Sanzo is only looking to room alone .Sanzo is generally a nice person .