Hide-and-Seek

Prankster Imps (いたずら小鬼) are creatures that live in the Forest of White Dreams, which have the ability to perfectly impersonate someone.

10 years ago
When the Seven Deadly Sins was chased by the Holy Knights, Diane hide in the Forest of White Dreams and made the imps serving her and hide her from the Holy Knights, otherwise she will go on a rampage.

Forest of White Dreams Arc
When Meliodas and Elizabeth entered the Forest of White Dreams. The Imps following an order from the Diane, though that they are Holy Knights. First they impersonated Hork, but Meliodas didn't show mercy, and punched everyone, including the real Hork. After that they went for Elizabeth impersonation. As Elizabeth's they tried to capture Meliodas, but he was too quick for them. They suggested that will do anything to prove that they are the real Elizabeth, and that was liked by Meliodas.

He started giving them order: right hand up, left on the cheek; saying him name with embarrassed face; massage their breasts. After that he gave them the last test, to jump as high as possible. All of them jumped, except the real one, who was embarrassed, since Meliodas have stole her panties before that and he quickly took out all the fake Elizabeths.

The imps quickly runned towards Diane, apologizing that they let a Holy Knight in. After Diane decided to leave with Meliodas, the Imps where happy, because after 10 years, they would finally live again in peace.

Abilities/Equipment
Prankster Imps have the ability to perfectly mimicry every living creature with their Hide and Seek ability.

Diane
Whilst Diane was staying in the Forest of White Dreams, the imps served her like she was their master. They were all willing to protect her from the Holy Knights, because they were afraid of her strength.