What do you mean "she wasn't introduced?" We see her in KH1 o_0
Besides, why do you think translaters made the error of "Bleig" or "Why did HE pick you." You don't question it, the answer is just that mistakes happen.
also in Re:CoM they mistranslated Lethal Frames, to Lethal Flames.
EDIT: they also mistranslate Dilan's name to Dilin