Originally Posted by
Castellan
I don't think it's really about what he expected to happen. Olympus makes it pretty clear that he implicitly trusts that whatever Caenis does, it'll be something to his advantage. He didn't expect them to join up with the Chaldeans necessarily, but he expected them to be a spanner in the works for the Olympians that he knows he'd have to deal with eventually in order for his plan to succeed. He wasn't expecting the Chaldeans to be able to get around Caenis' kind of finicky personality (at least while under the effects of Mad Enhancement,) but he also trusted that Caenis would find their way back to him eventually because they know enough about Kirschtaria's plan (and his general dislike of the Dioscuri) to trust him in spite of what happened in Atlantis.
And a lot of Caenis' more aggro moments in Atlantis are likewise less about them being aggressive (although they definitely are) and more about trying to avoid Kirschtaria having to get involved in the confrontation with Chaldea because they're well aware of how fragile Kirschtaria actually is beneath that air of invincibility and how he needs to conserve his strength for the final confrontation with Zeus. It's almost like a particularly violent protector instinct.