This is the 13110th most frequent Korean word.
동화의
"Of a fairy tale."
In this sentence, '동화의' functions as a possessive modifier, describing the '세계' (world) as belonging to or related to fairy tales.
동화의 세계는 어린 시절의 추억을 일깨워줍니다.
The world of fairy tales awakens childhood memories.
Here, '동화의' modifies '주인공' (protagonist) to signify that the protagonist is from a context related to a fairy tale.
그는 동화의 주인공처럼 용감하게 행동했어요.
He acted bravely like a protagonist in a fairy tale.
In this instance, '동화의' describes '분위기' (atmosphere) as being characteristic of a fairy tale.