Rina is the name of a time-traveling girl from the future, who appears in various different adaptations of the franchise. In all incarnations, she is from a post-apocalyptic future, although some details may differ.
- The general differences between the incarnations of Rina involve her relationships with the two men that had also come from the future. In the manga, the the boy who loses his arm is her older brother, while she has no strict relation to the Commander. In the 1968 anime, the boy with the lost arm is identified as her boyfriend Jack, while the Commander is identified as her older brother Noah. In the 2001 incarnation, Rina has a younger brother named Phil (who was created specifically for the adaptation), has a boyfriend named Nichol that winds up killed, and the Commander is a teammate of hers named Cain.