we're fairly certain that cetus and i share a canon
cetus is the name they were born with. cepheus is the name i was born with.
cetus remembered their name after the universe took them out of their time loops. i remembered my name by the time i turned back time to freeze vaugarde in time when i was happiest, in its perfection. the vaugardian word for my name was king, which is why i went by the title of king.
what is a king but someone who acts against the will of the people?
cetus was originally supposed to be the one to defeat me. they accidentally put themself in a time loop to do so. when they failed at every attempt, with every strategy, and finally accepted their victory was impossible... they wished for help from the universe.
the universe destroyed them.
the euphrasie that existed afterwards blessed mirabelle. perhaps that was the help the universe sent. mirabelle came with a party of saviors, including siffrin. to defeat me.
siffrin accidentally put himself in a time loop as well. cetus, from the favor tree, did what they could to help siffrin; they didn't know much about the time loops, but they knew how to traverse the house. together, the two managed to help the party defeat me.
after i was defeated, siffrin's party adventured together a little longer, but soon went their separate ways. but siffrin didn't know how to be alone again. how to be happy alone again. eventually, they reached their lowest point, and made a purposeful wish to the universe to be with their family forever. the family they remembered.
the universe gifted power over timecraft and took them back in time. but this time, they weren't one of the saviors. this time, they were the king.