Imps are creatures of the world's inbetween dimension. they're formed from the emotions of entities of the world's main dimension, where we live. most Imps are made of negative emotions or neutral, rarely from positive emotions. Imps are mythed to be only seen by innocent children and kind hearted elderly. negative Imps (Imps formed by negative emotions) were thought to be uglys in older times and are mostly the reason kids are scared of the dark. However Positive Imps were said to bring good fortune and great wealth, their numbers had dropped due to being captured by humans who's been able to see them without being young or old.
