The word in Korean that they are using is Dokkaebi (도깨비). Wikipedia says:
Dokkaebi (Korean: 도깨비) are legendary creatures from Korean mythology and folklore. Dokkaebi, also known as "Korean goblins", are nature deities or spirits possessing extraordinary powers and abilities that are used to interact with humans, at times playing tricks on them and at times helping them. Usually, dokkaebi don't have a particular look and each record has a different form, generally Korean traditional dokkaebi wear hanbok, and most dokkaebi' surnames are 'Kim.'
The word in Korean that they are using is Dokkaebi (도깨비). Wikipedia says:
Dokkaebi (Korean: 도깨비) are legendary creatures from Korean mythology and folklore. Dokkaebi, also known as "Korean goblins", are nature deities or spirits possessing extraordinary powers and abilities that are used to interact with humans, at times playing tricks on them and at times helping them. Usually, dokkaebi don't have a particular look and each record has a different form, generally Korean traditional dokkaebi wear hanbok, and most dokkaebi' surnames are 'Kim.'
https://en.wikipedia.org/wiki/Dokkaebi