>>24699
as a quick rundown: I'm approaching this in a Jungian perspective. Typically dream analysis is done over the course of months, where a therapist would be learning a lot about the real-life context of the dreams and could pick up on recurring, significant patterns. The general purpose of dream analysis is to bring up the whole character of the analysand, beyond just their conscious attitude and persona. So typically dream analysis is meant to reveal what your mind is working on, and where it's going. The same sort of analytical process can be applied to fiction, to analyze the author.
>Luna
The waifu is in part a representation of the anima, which in very brief words is the feminine, relational aspect of a man's personality. Luna is a strongly archetypal pony associated with other feminine symbolism like nighttime, the moon, magic, sleep, etc. Her friendliness and helpfulness is a sign that you are open to those feminine qualities, which is good. I'd bet without her, you'd never come to this dismal setting, or be at ease enough to accomplish your tasks.
>mismatched ruins at night
this is interesting. Especially how the factory/powerplant aspect is mixed in with the more homey, classical stuff. It seems like you're describing that bits from all of these settings were mixed up in the same rooms - it wasn't like, this room is a palace, this room is a manufacturing plant. The age of the setting and the abandoned atmosphere usually suggests either an archetypal "timelessness", or some aspect of yourself that has been left behind. I'm inclined to interpret it as the latter, because this jumbled-up furniture suggests some confusion or undifferentiation, indicative of undeveloped childhood stuff, or perhaps just hazy and half-remembered. The night emphasizes the theme of barely-conscious content, suffused with mystery and shadow. The power-plant/manufactory motif is worth considering as a masculine, productive theme, but I think I'd need more context to say for sure - perhaps it will come to you in another dream.
>catching ghosts in a jar
Very often, as we grow, we learn to adapt by discarding parts of ourselves; and in that process, we throw out too much, the baby with the bathwater. The ghosts show that when the ruins were left behind, a part of your soul, so to speak, died, and now they remain haunted by a kind of life. You're coming to this derelict place in order to catch these ghosts, and thus we can say that the ghosts represent something of value (a part of your soul) that you will be taking back to your present, conscious life. Yet still, the ghosts are in jars - I would say this is a good thing, because you wouldn't want those cold ghosts free to wreak havoc closer to home! In Jung's essay on The Spirit in the Bottle, where an evil spirit must be trapped in a bottle to transform it into a good one, it's clear that bottles are vessels of transformation, like the alchemical alembic, where something may be observed and processed in order to bring out its good qualities. I think one could safely say that there is a process to transform those ghosts into life-saving fairies, so to speak.