Way out to sea, far away from the underwater city, there lives an orca. An abnormally-large orca. As large as she is, she manages to be gentle, and protects any lost creatures she can find way out in the depths of the sea, sometimes with her very body. She has a reputation, small as it may be, for swallowing sinking submarines which have come out exploring and gone a little deeper than what they can survive under, or that have been attacked and cracked open, and protecting the inhabitants. Now, she swims around her oceanic home, keeping an eye out for any creatures who may be in trouble.