In the anime, Ushiro fights for an entire day Zearth to die smiling for saving the earth and his sister more specifically.
In the anime, Kirie being the only pilot to pilot Zearth twice, proving during his second fight that he's easily the best pilot in the entire series, and then unmasking Machi as the uncontracted pilot. That last one doubles as a Dying Moment of Awesome.
Also in the Anime. Machi, how does she redeem herself? By helping Ushiro save Kana from the contract, killing Koyemshi and then forcing her way into the contract, fully replacing Kana.