Western Crossover: Sorry My True Form Is a Deep-Sea Behemoth

Leviya was in a daze until she was thirteen. She didn't know who she was, where she was, or what she was meant to do. Then a couple found her asleep by the river and asked the circus owner to take her in as a ticket seller. The owner did, then was delighted to discover her talent. The “mermaid” who could perform underwater soon became one of the circus's star attractions. A few days later, a little bird soaring through the sky spotted her at the bottom of the pool on a pitch-black night. The golden boy thought Leviya was drowning and dove in without hesitation, only to get a cramp on the spot. In the end, Leviya had to drag him to shore. Leviya thought her peaceful life at the circus would go on forever. Then, beneath the dazzling lights that day, two pools of blood brought back her memories. Leviya, remembering both her past life and this one: ... As she looked at little Grayson crying as he hugged her, and a young Bruce watching the two of them, she began to think about how to avoid a bad ending. Unfortunately, events spiraled out of control like Superman with the reins off. “Father, I'm sorry.” Leviya smiled as her body slowly fell apart. “This is the end.” Before the gravely injured Bruce, she returned to the boundless ocean. In the end, all her adoptive father received back was the suit jacket he'd given her. When the Batcave learned that a superpowered villain who looked remarkably like Leviya had appeared in Gotham, everyone was furious. But events took a turn as astonishing as the dancing little people who appear after you eat Bruce's cooking. “Anyway,” Leviya said, lifting the hem of her white dress and waving to Batman in the poison-gas-filled cavern, “I won my resurrection match.” Old Bat: “?” Dick, who'd rushed over from Bludhaven overnight to help: “?” Jason, who'd just had a huge fight with Bruce: “?” Tim, who'd only recently become Robin: “?” Damian, far away: “?” Leviya, suddenly attacked by a swarm of black-haired, blue-eyed people: “?” Wait, stop hitting me! It's really me! Let me explain! [Please Note] 1. There are a lot of unrequited romantic feelings directed at the female lead. If you're not into that, please think carefully before reading. 2. The timeline jumps around a lot. It's best to think of it as a parallel universe to the original. 3. The female lead isn't a take-no-prisoners powerhouse from the start. After she “dies,” her combat abilities improve and she switches to magic. 4. This is a work of pure personal indulgence. If you feel uncomfortable, please stop reading. Theme: Study hard and work hard