peridot!!

A green, gem-shaped character with a large head and a smaller yellow companion appear in a glowing circle with the text "I WAS" before the scene shifts to the green character being held by a larger figure, then shown with a shocked expression, followed by a silhouette, a crouched pose, and finally a scene in a kitchen where the green character stands with a glowing hand, while a white-haired character reacts with surprise and a purple character holds a pizza box.