Green Square Person
Green Square Person is a very literal-minded resident of Teras Terrace who prefers descriptive appellations over arbitrary names, to the extent that ou insists that ou ouself should simply be called "Green Square Person". Ou answers to "GSP", but invariably feels it necessary to vocally clarify "That stands for Green Square Person!" Green Square Person calls others by similar designations; Dr. Loregaard is, for instance, "Beak Heads Doctor", and Pete Cranshaw is "Flying Blue Disk Guard".
Green Square Person makes a living by hitting objects with plastic ladles. Apparently someone is actually paying ou to do this, but it's not at all clear who, or why.