Well, I just finally got around to listening to WND 29 and it has gotten the wheels in my head turning about Kalani.
I'm still riding my "Riley is the rat" thery to the bitter end but this popped into my head and I haven't seen it mentioned yet so here goes:

Kalani says he flew from Hawaii and crashed at LAX and that only three people made it off the tarmac. If Kalani is one of those three and this Hannah (most likely the redhead from the Golf Course) is the second, then who's the third? What if the third person was Pippin? I know he claimed to have been hiking nearby when the outbreak occured, but we know he was sent as a spy by the Mallers so that story could have been a lie like his escape story.

So I'm going to throw out this possibility: Kalani, Hannah, and Pippin escape from the tarmac only to be captured by the Mallers. Kalani gets sent to infiltrate The Other Tower with the Mallers holding Hannah hostage as collateral. The Other Tower falls and Kalani is taken to the Arena where he is rescued by folks from The Tower. At first he acts as a mole by contacting the Mallers during the party, but after the War he chooses to break contact. Pippin is then sent in to reestablish contact and is shot by Kalani to cover his secret.