Posted. One of the elementals dropped the rare drop and an Air Crystal (hint, you got a Critical on the loot determining roll, so I gave both drops for it as the bonus affect). 

Also no big elemental is appearing for now, sorry. But with eleven killed if you decide to kill more your chances can only get better (although personally I don't recommend trying to go for boss mobs. The boss mob for these elementals would be tough, even for Saito. Probably even tougher than whatever Ren was fighting in my personal opinion, the thing that put Ren in the deadly status.