An explosive cloud of mist billowed out of the wall, instantly filling the brig from wall to wall.

“Happy New Year—!!!” Pinkie yodeled into the wave of steam.

- Utaan, "Today at the Steam Sale"

Pinkie Pie is one of Rainbow's friends, and the bearer of the Element of Laughter. She was vaporized like the others during the encounter with Discord, and was subsequently revived in the machine world beneath Shoggoth.

While in ghost form, she has retained her Pinkie Sense which allows her and Rainbow to be aware of impending danger.