Kanon, Jill and Shouko walking out alive, almost got burned after the building that they were imprisoned in got destroyed. With a little music.
Kira Deco!
The final battle in Episodes 51-52. Not only the Kira Deco 5 gained their 11th-Hour Superpower moment, but Ruby restored the Mirror ball in its original state and defeated the Dark General.
Happiness
Mouri's Archery scene in Episode 12. Seriously he stood up to Apel's challenge and shoot the Sakuramochi in a serious point-blank position.