Resistance (Sonic X)

The Resistance is a group that appears in Sonic X. It was a small group of soldiers who fought the Metarex in order to restore the glory of their now-destroyed planet, Cascade. Molly and Leon are the only named members of the Resistance.

Anime
Having fought the Metarex for many years, the Resistance was growing weary. However, Molly decided to keep fighting, which resulted in her death due to engaging Pale Bayleaf's fleet alone.

Eventually, the rest of the Resistance were rounded up by the Metarex. They were all consumed by trees that grew around them, killing them.

Since the Resistance fighters were the only survivors of Cascade after the Metarex attacked, their death leaves the Cascadians virtually extinct.