Warning : Mc's real name, Enjel's areas and endings in general
Dim Dream is weird for many reasons.
Not only because it's relatively trippy compared to other songs, with its rather airy and angelic vibe, (especially after Lisettes hostile area) but also because of its setting.
I'm not sure if anything has been confirmed, but the areas where this song plays almost reach the literal gate of Goldia's mind, so I always considered them to not be part it, at least not completely. The music and art already prepare us a lot for what is to come as well, backing up the theory.
Especially since, in my opinion, Enjel's areas have the least resemblance to the rest of Goldia's mind, and for a good reason too. The moon and stars are mostly suitable for a storybook one reads to their child before sleep. After all, Enjel is the only character that isn't part of Goldia—but that's for another post dedicated to Enjel specificaly.
Dim Dream is strange because of the character it encompasses. A strange, crudely yet scarily accurate made copy of someone real. A dream, one might say a promise, of a better life.
But the music is hazy—the lavish furniture that used to made up rooms before now float above an endless void, and that's because it can only mimic what is real, what came before this area. And yes although the previous ones were full of fairytale and wonderland-like situations as well, they still had some sort of base, that being a real person's experiences and psyche.
The only real resemblance to the earlier game areas are the pumpkins (that are a constant thanks to the strange boy's influence) but even those have changed into a less real form and more like something you'd see in a book.
But after leaving them and gathering the regalias (or not) once the player reaches this place they find themselves in an awfully... serene setting. One unlike the abyss of a sleep and more like someone who is waking up. Quite literaly a representation of Goldia leaving this subconscious space and moving closer to waking up from this now Dim Dream.
See what I did there?
The hostility from before is easily replaced by the neutral nature of this void holding up all else, (at least at first) and its that lack of hostility and the fact Goldia has her new friend Enjel by her side that urges her to carry on. I always thought it was a bit strange that she manages to stay positive in these areas after all she's been through but my personal headcanon is because she can sense how close she is to leaving this mindspace.
Goldia at that very moment is waking up, regardless of what ending you are getting.
And Enjel is damn aware of it, which is exactly why she gets so frustrated.
A dream can only last so long before the individual wakes up, and much like the angelic music, Enjel's welcoming behavior is also a dream waiting to be shattered.