I snuck into falcoms HQ and snagged the script for Kai 2, here's an excerpt from a boss fight
>Van: Damn it, my stun caliber isn't doing anything to this guy! i was gonna save it for later but it looks like ill have to go grendel an-
>???: THAT WON'T BE NECESSARY
>???: TIGAAH CHAAAAAAAAAAAAAAAAAAAAAAAAARRRGE
>Van: Thanks for the assist, but, wait, are you...?
>Camera very slowly pans up
>???: Haha...looks like i got here just in time
>Name Reveal: DETECTIVE LLOYD BANNINGS, SPECIAL SUPPORT SECTION
> Lloyd: Detective lloyd bannings, haha...I've heard a lot about you from Rixia, but it's good to finally put a face to the name, Van Arkride

Special Support Section leader Lloyd Bannings, and the rest of the SSS will make their appearance in Kai 2 after the player kicks a boss ass, but it turns out the boss was HOLDING BACK during the whole fight, just when they're about to unleash their full power on Van, Rean, Kevin and crew, Lloyd will cancel it with a well timed "NOT SO FAST" and TIGER CHARGE while the SSS pelt the boss normal attacks, after this, Van and company will thank Lloyd for the assist, and gear up for the REAL boss fight this time, after the player trounces the boss, Van, Rean, Kevin and company will all put their weapons away, and each take a turn thanking Lloyd and the SSS for their help, again, after they leave the boss area, the game will fade into Van and company's base of operations, where they will each proceed to thank Lloyd and the SSS for their help, for the second time.
Also, the rest of the Sky trilogy cast will be in the game purely as backup for the final dungeon, they won't really be doing anything of note for 90% of the game.