Scrapheart
"Volantis," said Aldrich. "Before you were rudely cut off, you mentioned that demons don't work well fusing with another. As far as I'm aware, this is true as well. I've never encountered a proper demon that had a symbiotic relationship with a host body. It was always a matter of domination, complete takeover."
"Yes, Armored," said Volantis. "Demons take over by their nature. They are, after all, birthed of the Formless Chaos, and Chaos decays. They may reach an agreement with a host body, but inevitably, there will be competition between the host mind and the demonic parasite."
"We have recorded this phenomenon in our timeline as well," said Beta. "The Alpha-Ikon-Ivan fusion is one that is highly unstable, with three different personalities all vying for control. Even Ivan is a human of powerful will capable of contesting Alpha and Ikon."
"Three dudes holed up in one body? Sounds like a nightmare to me," said V.
"Or a wild romp," commented Chiros.