Yeah, there’s going to be more explaining with this one. It’s more of an iceberg type of lore, it takes a lot more than this fun fact to explain EVERYTHING.
MORE LORE?!?! Spinel Seraphim (and yes, this is cannon once more), was actually taking part of my own Dandy’s World infection AU, in which that it is a Yandere infection AU, in which is still ongoing. Why this is important because that she had been infected with the infection, but of which that not only she had been infected with the Yandere infection, she had been exposed to Chara’s existence as a whole, and thus she had been infected with both the Yandere infection AND got possessed by Chara, and is then an eternal entity within Spinel Seraphim. Though Spinel Seraphim gets cured of the Yandere infection by the end of the AU, she still has Chara within her SOUL.