Moon Rover

She was so sweet! She was trying to selflessly save someone. Rainbow pulled Twilight out of danger but for a moment Tempest and several others believed they had turned Twilight to stone. When they realized they hadn't, they were momentarily confused. I think Derpy/Ditzy/Muffins' act still counts. I bet someone will realize what she did when there's time to rest and process everything. When crazy or traumatic things happen it takes a while sometimes to get all the events in order. But Derpy probably knows that gratitude isn't important, and that she did her best to protect Twilight. If there were other Elements of Harmony, she'd be selflessness or courage. I've started making a list of hypothetical other Elements actually, haha. It's kinda fun!