Gantz' Mom is a minor character is the original Grandia. She is a resident of Parm and mother of Gantz, Tentz and Gontz. The party meet Gantz' Mom when looking for the Spirit Sword as per the challenge with her son Gantz. She does not need to be spoken to as part of the story but, if you do speak to her, she will talk to you about her son and her hopes that he is staying out of trouble.