Don't you love it when the best athlete of a sport which 99% of the people don't give a fuck about acts like an elitist snob? There should be other ways to attempt to create a compelling final boss for your story, other than this.
It kind of reminds me of that other manga about beach volley, which I dropped halfway through chapter one after one of the girls flips the fuck up and antagonizes the MC after she makes a half assed joke.
@Nezchan: Probably because Rikka is at odds with anything that takes HER Mana away, specially Regina. So basically she's now extremely pissed at her adulterous wife, and the mistress.
I feel bad for both of them: For the girl forcibly taken away from her home and forced to fight to the death against monsters; and the girl who, if defeated, will die for real.
Ryuuka: "Sorry, but you can't touch this. It's the only thing I can't let you do"
Toki: (deep thinking on what could that pendant be to cause such change in character)
How I read it:
Ryuuka: "This pendant is the only thing I wouldn't let you touch"
Toki: (proceeds to stare at Ryuuka's ass)