Powers: It can make things disappear
Captured in: Episode17: Sakura's Scary Test of Courage
How it was captured: When Sakura and her classmates were walking through a dark cave on their field trip's "test of courage," one by one, they began to disappear. When only Sakura and Li were left, they used Float to get across the water to a small shrine at the end of the cave. Sakura opened the shrine's doors and Erase came out. She immediately sealed it away, and everyone soon returned without any memory of what happened.