tip: hetalia f/f sort:kudos
This series is based on a series of original stories by Cor. "It" is an invisible shapeshifting creature. Basically they capture humans and torture them with tickling. They tend to get attached to one particular human at a time and keep them as a sort of pet. They usually make themselves visible to humans as a cloud of glove-wearing hands. Cor doesn't say anything definite about what they are or why they do what they do. Thanks for reading and sorry for the confusion!
Oh, ok. Thanks for clearing that up!