"I think so. In my world, my parents and my brother died in a car crash. Or... I think from Death overturning the car? I don't remember it clearly, and nightmares that I grew up with changed a lot of the details," Hamuko admitted. "Before the tenth anniversary of it, something stirred in me, and I woke up to Personas - and so did Death, for a while."

So it wasn't that Death was active in Ken, right? But bringing up the Kirijo Group...

"...We made the mistake of taking out the Shadows from that experiment. So the Fall was inevitable," she gestured to herself. That's why she became the Seal.