During the four years of development, Paradiso Phantasma met multiple changes, most of them influences by author's living experiences. The rest happened upon finding new inspirations such as the book Lesbian Love Addiction: Understanding the Urge to Merge and How to Heal When Things go Wrong, which led the story to retain the romance intended from the initial concepts while staying outside the tropes it goes against.
The whole thing about Hometown gatekeeping so much information about the outside (languages, countries) is the perfect metaphor for lesbians discovering that women DO fall in love with each other. That's why it's a process for Luna to learn how the city and the real world, ajena a la ciudad, work. She's forced to accept new things, new reality extremely different from what she's been taught. It's not only about herself and her sexuality, it's her entire worldview. That's how it feels for homosexual women. And that's why it can't be done with Claire by her side. Claire does help her little by little — but not only with romance, with human relationships. Luna learns not everyone is bad, although it's not great that Claire treats her well because she's physically attracted to Luna but that's a topic for another day.
Cassiopeia is the reason behind the name Ghost Girl Phantasma. Meant to be a ghost, her entire narrative switched.
In the current version her nature is vague, open for interpretation and supporting both theories.
This drawing represents one of the concepts behind her death, missing an arm. The idea of her dying from a stray bullet meant to hit her lover was considered before scrapping everything.