
Quick answer — Yui Itsuki voices Kira Sakurazuki in Futakoi, Paula in Black Butler, Moe Mizukoshi in D.C.~Da Capo~ and 1 more characters.
Yui Itsuki voices Kira Sakurazuki (Futakoi), Paula (Black Butler), Moe Mizukoshi (D.C.~Da Capo~), Mio Osakabe (Kanokon: The Girl Who Cried Fox).
Kira Sakurazuki is voiced in Japanese by Yui Itsuki.