This was kind of then revealed why Drawcia ended up doing everything she did, 1, for the sake of other's happiness, 2, because of the corruption that took her mind, and 3, the pure jealousy she had of other being happy and wanted that in some way for herself, because she genuinely couldn't get happy and even abandoned her sisters for the reason she feared she would kill them, simply because they were her only happiness at the time but didn't want to destroy that.