I recall that there was a sequel game that Squenix put out for mobile phones only. In it, Rydia was forbidden from returning to the Land of Summoned Monsters for exactly this reason.
Also, lookin' kinda Yagami Light there, Cecil.
Rydia, you can't do that...EndingFrom pretty older sister type, to old...After returning to the partyFrom loli, to pretty older sister typeThe flow of time in the Underworld is differentI'm going back to the UnderworldI've got to do something...