Fan Casting Aquagirl in Batman Beyond Animated Movie Series

An Atlantean princess and the daughter of Arthur Curry/Aquaman and Mera, and a member of the Justice League Unlimited. Aquagirl wasn't too receptive to the second Batman's enrollment in the JLU to find the supposed traitor within their ranks, though she was friendlier than fellow teammates Big Barda and Warhawk. Aquagirl exchanged a few cordial words with Batman and even invited him for a swim. Batman preferred to pursue his investigation. During the swimming session, Superman, under the influence of Starro, sabotaged the tank and raised the water's temperature. Mareena was trapped inside, but Batman blasted the door open with Big Barda's Mega-rod, freeing her in the nick of time. Though weakened, Aquagirl quickly recovered. Thereafter, she grew even fonder of Batman. Shortly after, Aquagirl departed with the JLU to save civilians from a bombing in Metropolis. She summoned a pod of dolphins and a whale to pick up victims in the water. When Warhawk was seemingly killed in an explosion, Mareena took it quite badly. However, Warhawk soon returned alive, and Superman was revealed to be the instigator. The League confronted their leader, and once Aquagirl touched Superman's chest, a creature emerged. The Man of Steel took on his teammates, but was eventually forced to flee. Aquagirl and others set off after him in the Fortress of Solitude. After subduing Superman with a piece of Kryptonite, Aquagirl tapped into the mind of Starro and ascertained his background. Suddenly, the League was attacked and subdued by Starro's psychic-parasitic clones. Under the creature's mental hold, Mareena tried to open the pool's steel door and release the spawns into the ocean, but she was intercepted by Batman. She was rushed to the surface and relieved of the mind grasp. After securing every creature, Aquagirl made telepathic contact with Starro, who showed her the whereabouts of its planet.