I am not expert in Twi, but I don't think that the hebrew character is the one meant to use for 'kou'.
I think it is Unicode "open o" http://www.fileformat.info/info/unicode/char/0254/index.htm http://www.fileformat.info/info/unicode/char/0186/index.htm
Ɔ and ɔ
Whether or not this is correct, I suggest adding details of the correct unicode code point and name for special characters when they are explained, as it is otherwise hard to find on the internet. --(added by an anonymous user in September 2009)