Kensou has two in the NESTS saga. If you use him to beat Krizalid in 99, he awakens the Dragon Spirit to save Athena and himself.In 2000, he saves Bao's life after he takes a massive beam from the NESTS Kill Sat and again releases the Dragon Spirit, recovering his powers.
If you don't fight Kula Diamond, you will see Heidern kick ass and take names via disabling Zero.If you do, Diana and Foxy disable him instead. And in Kula's own ending, she suceeds into dismantling the Zero Cannon... which prompts Candy's own CMOA with her Heroic Sacrifice
When Ash Crimson saves the day and our timeline, revealing his benevolent true intentions and getting himself Ret Goned, it's pure awesome. And puretears.
And in 2001, when K' saves Kula in the Hero Team ending.