I think I remember, Marionette was the female Puppeteer from a older version of the game before the male Puppeteer replaced it, it seems like the choice of choosing Marionette is still in the game's system but about only seeable by a Dreamer in a position of only 1 demon, corrupted and used ability on said evil.
Also a Oracle might also get that rare event as a corrupted with only 1 demon too.