yeah thats a common error cause many American's said it that way with Ryu from street fighter. I guess people still don't know how to pronounce their names lol.
(Honestly though it's easy for me to talk because Portuguese and Japanese pronounce vowels the same way... I understand when English natives might have trouble with it)
Oh yeah! "Ko-ka-row". I hear that ALL THE TIME when people say her name on their mics. So annoying. >_> I find its usually Americans who mispronounce the Japanese characters names. I guess its to be expected though lol