Who is silent.

"Did you seriously think this would make me balk?" he asks.

"Did you talk to him? My old man?"

"He… wanted me to pass on his best wishes, basically?" says Theo. "… He says he loves you."

"Okay, and why was he there—you mentioned Lady Yunalesca?"

"And her unsent spirit who happens to steal guardians from summoners going to defeat Sin. … Yep."

"Lady Yunalesca what?"

"—I'm going to need some more context, here."

"Her unsent spirit takes a guardian with a strong bond to the summoner and – uses them, or preps them, or something, for Sin."

"What does that mean, though, preps for—"

"The fayth of the Final Summoning," Auron explains. "The power that links summoner and fayth, powering the aeon, is a deep desire to defeat Sin and give everyone hope. That power is not enough to actually defeat Sin, and the bond between friends, lovers, siblings, a summoner and their guardian, only that can create an aeon powerful enough to temporarily defeat Sin." Pause. "And then become Sin."

"Wait, what? Why?"

"… To keep the cycle going?" shrugs Theo.

"What cycle? Why do people become Sin?"

"Yeah, dude, you can't just spring that one on us and not explain."

"Fucked if I know, that was a guess."

"Did my old man tell you that?"

"He said it's what's been happening and it's sorta a cycle so – I guess?"

"So... summoner goes on pilgrimage and gets the Final Aeon, who's one of their guardians. And when the Final Aeon kills Sin, it becomes Sin..."

"No way... There's just no way that's true!"

"It could've been a very convincing fake, I suppose," says Theo. "I have no idea about the limits of magic."

"It's true."

"So, okay, I knew Yevon was corrupt but this is taking it to a whole other level."

"I mean, I think it's possible that Yunalesca is just being really evil on her own, or Sin has some weird magic meaning it resurrects around what defeats it… but yeah."