What single symbol has the same sound when spoken after a consonant as the English capital letter " i " sound?

I'm looking for a single symbol that would create the sound of a capital letter " i " (other than an actual capital " i ") , the overall sound i want to have is that of the syllable "Kai" ; however, i want to accomplish this using only one letter or symbol after the "k" .... So what i'm basically asking is if anyone knows how to type " ki " so that it sounds like " kai " rather than " key " by some means other than replacing the " i " in " ki " with two letters, and while still retaining the "k"..... Much Appreciated.