Tikal (Sonic the Hedgehog character)

Tikal is a girl from Knuckles' tribe of Echidnas with very mystical powers. She debuted in Sonic Adventure.

Tikal was the one who sealed Chaos within the Master Emerald, but it was released by Doctor Eggman when he tried to free the monster. In the game, she appears as a little ball of light in every stage and area when you need help.