These things are very odd. Swell slimes are gray and can be bought at the Drewland market. They are much slimier than Goletts. Unswell slimes live in the slime kingdom, ruled by Slime Princess. Slime Princess is like Maid Marian, except much more crafty. Grey slimes are accepted in Drewland, yellow unswell ones are not, and will get kicked out like smack smack smack. They will constantly cling onto any surface, therefore they are favored in Drewland.
The unswell Slime people.
Yes, she looks very crafty, doesn't she?