Jack

Despite popular belief, Jack is a female character from Puzzle Bobble 3. She is a skilled card dealer and works in a casino/bar. She loves roses and her name is most likely a nickname based on her suite of cards. She was pulled into Rainbow World by a spell cast by Bubble Worlds Magical Master of Mischief... Dreg.

She is often mistaken for a feminine boy, most likely due to her slightly deeper voice, sense of dress and her name. However, based on the original, official collectors promotional cards (now unavailable unfortunately), this is proven to not be the case.