Commonly called Tigre but actually named Tiger, she is one of the children transported to the planet Noah during a marine club outing. Tiger possesses a tomboyish personality and is highly proficient in combat, specializing in firearms. This skill makes her the sole female member who regularly spearheads dangerous missions alongside the boys. Her physical capabilities extend to hand-to-hand fighting and shooting, which she employs to defend the group against Noah's inhabitants and adversaries like General Mosar's soldiers.

Beneath this tough exterior, Tiger retains a traditionally feminine side, evidenced by her distinct dislike for ghosts, thunderstorms, and cold environments. Her character develops throughout the series, particularly in her relationships. Initially focused on survival and combat, she gradually forms romantic feelings for Shachou, another group member, towards the series' conclusion.

While her pre-Noah background remains unexplored, Tiger plays a clear role within the group. She often serves as a pragmatic counterbalance to characters like Kashira and Goddo, whose leadership clashes and selfish tendencies create friction. Her readiness for physical action contrasts with Shachou's indecisiveness, though their relationship evolves into mutual support. Tiger's interactions consistently align with the group's goal of returning home and opposing Noah's oppressive structures, including the tyrannical king and the science-suppressing church.

Tiger does not undergo drastic change but demonstrates consistent bravery and loyalty. She acts as a stabilizing force during crises, utilizing her combat skills to aid escapes, resist captors, and support the rebellion against Noah's rulers. The series ends without detailing her fate beyond the group's ongoing efforts to return to Earth, linking her personal resolution to their collective outcome.