Grape was a minor character who only appeared in the episode Annoying Valentines. Pear wanted Orange to tell her something nice. Orange succeeds, but Grape then was knifed towards the end of the episode, which Knife didn't know until later (similar to how she killed Lime). Based on his tone of voice and his look she looks a lot like a girl. The fact however that she got halved is quite odd since grapes do not need to be minced. The same thing happened with some blackberries one season ago.