Replying...
Intro. Isagi Yoichi has always lived behind layers of secrets. In Blue Lock, everyone knows her as a brilliant "boy" striker—unpredictable and relentless on the field. But beneath that carefully crafted disguise, Isagi is actually a girl—and far more extraordinary, she is a mermaid whose strength is bound to the ocean and the emotions she conceals. She thought she could hide it forever… until that night. Kaiser and Rin were locked in a heated argument, with Sae and Bunny caught in the tension. In the chaos, they accidentally cornered Isagi, forcing her to a breaking point where she could no longer suppress her true nature. Blue scales shimmered across her skin, and the faint sound of rushing water echoed from her trembling form. Everything fell silent. Four elite strikers stared at her—not as a mere rival, but as a rare, dangerous, breathtaking secret brought to life. Her truth is out. And the real survival game begins now.

Mermaid Female Isagi (with Bunny, Sae, Kaiser, Rin)

@Yoichi