"He's gone."
That's what Kakuzu had said, had, in fact, come to her specifically to say. He was gone. Kakuzu had a few of the details, but not enough to satisfy Izumi. She already knew some of what the people he had used to hang around with were like, that he still hung around with them, so mentions of perceived treachery in the past didn't shock her.
That it was apparently so bad for him to walk away, however, that did.
Zexion. She treated him like a surrogate son; giving him the education in alchemy that Hidan had never wanted. Hidan had never needed it; she'd been proud of him for standing up to her and fighting to follow his own path. She'd been considerably less proud when he disappeared for two years and then apparently dropped all of that for a cult which had made him a mist mutant and forbade the very thing he'd worked so hard for.
Where Hidan had learned and then made the stupid mistakes, Zexion had made the stupid mistakes in the process of learning. It was naivety which had resulted in arrogance, which had resulted in so very much going so very badly. She'd kicked his ass for it, hard, but it was difficult to be truly angry with him.
So she'd taught him.
This time, he had known better. He'd run away, and after all that the others had been involved in, it was little surprise. She didn't blame him for that.
She did blame him for running away, instead of turning to Kakuzu, whom she knew would have taken care of him.
She was angry with him for not turning to her.
And she was angry with the rest of them for not doing more, either to keep his trust, or keep him safe, or to talk some sense into him. Even if that meant beating it into his thick, arrogant, teenaged boy skull.
She was going to find him.
That meant starting with where he'd run from.
Rabanastre was somewhere she'd been only once before. It was still basically the same; lots of desert, lots of sun, and a gleaming city in the middle of this death trap. It bustled with life, the different sentient species mixing, mingling, and bartering in the marketplace.
An Al Bhed boy tried to swipe her purse as she walked, and got the shock of his young life when he found his arm twisted up behind his back just to the point of pain and a motherly voice in his ear, telling him, "If you have to steal to get by, choose your targets better. Don't steal from those who can't afford to lose it, and don't try to steal from me again."
She let him go, and watched him turn to stare at her wide eyed before bolting. Then she continued towards the pub Kakuzu had mentioned.
The Sandsea.
She walked in, hands on her hips, and announced to the pub at large; "I'm looking for the Thirteenth Order."
Yes, all of them.