For those who don't know the first thing about Russian, "ypa" transliterates to "ura"... it's a battlecry, similar to the British "Hurrah" or American "Hoo-rah". If you've played Call of Duty World at War, your guaranteed to have heard it.
Yes, this means that Hibiki is basically poke-taling with a battlecry.
Ура...
(That tickles)Hibiki-oneechan, spoil me nodesu!In any event, Hibiki-san's speech patterns are rather distinct, aren't they?
*Twitch!*
Yes. Even though you're saying nothing but "ura," somehow it can be understood. Belly button nanodesu!Errrotic!
*WHIFF!*
У... ура?
(Spe... Speech pattern?)
*Twitch!*
Oh, is that so?I think that is absolutely wonderful!Well, so long as we can understand you, I guess it doesn't matter. Wha...
What the?I shall not yield this!