Halloween Queen's analysis was quite correct, provided no other factors were taken into consideration, such as the intervention of Imagine Breaker.
If Kerissa's rebellion had not been stopped by Roy, the British Royal Family would inevitably have collapsed.
Although Roy had toyed with all of Britain, even making two princesses offer up their bodies and become his playthings,
in terms of the result, Roy had instead become the savior of the Windsor Dynasty of Britain.
"My Queen, remember this: sisters turning against each other is unacceptable. Even if you cannot treat each other with sisterly affection, you must not truly descend into a life-or-death struggle."
"...Human emotions involve the realm of the mind. Even those Demon Gods who have reached 8=3 cannot completely control their own emotions."
"Therefore, you must never let your emotions run unchecked. They will force you onto a dead-end path."
Roy spoke again, and this time, Halloween Queen caught the other meaning hidden in his words.
She pursed her cherry-red lips and said, "...Father, are you saying I should love my sister and live in harmony with her?"
Halloween Queen did not know whether Roy had any other children.
But she figured he probably did, since her father could cross the Sea of Worlds. That was a realm beyond Halloween Queen's understanding.
So it was only natural that Father would have other children in other worlds.
But Roy merely smiled and said, "...It may not be a sister. It could also be your younger sister."
"Another younger sister?"
Halloween Queen was somewhat surprised. If there were siblings born before her, she might simply not know about them yet.
But if they had been born after her, she felt it was impossible for her to know nothing about them.
After all, Roy had remained in this world