A Dimensional Drifter is a character in Stick RPG 2. He is found at the far southwest of the map, a few blocks from the Basement where the protagonist's adventure begins. He appears in the area at night (e.g., 9:26p; specific timespan to be determined) and sells the 4-Dimensional objects the protagonist seeks, for a price of $100,000 each.($50,000 with Discount Shopper enabled.)
It could be presumed that there are multiple dimensional drifters, because his name says "A Dimensional Drifter"