 Kato stated that Crono and Marle's fate "is not thoroughly explained in "Chrono Cross"" but that the two were likely involved in "some kind of incident" related to the invasion of their kingdom by the Porre army.He further explained that an intervention "from outside the original flow of history" had helped Porre build its military, though the details were left out of "Chrono Cross" as they did not directly relate to the sequel.On the other hand, Lucca plays a role in the backstory of "Chrono Cross", being involved in the "Project Kid" central to the game's plot and presumably killed by the antagonists Lynx and Harle.