Ryu KanedaWhile some unofficial sites have listed it as Ryuu Kaneda, the credits in Zero: Black Blood show the directors name is spelled with only one "u".
Kaoru MitsukiIn the 11th episode Game, Kaoru's name was on a game show entry form in English.
Garo: The Crimson Moon
All of the official spellings of character names are listed on the official anime web page in both English and Japanese.
Port CityBoth Kaoru's entry form address and a can of coffee in a vending machine from Makai no Hana confirm that this is the name of the city that some entries of the Garo series take place in.