mermaid au · my hero academia · explosive quirk · tsundere · rivalry · canon divergence · aquatic setting · protective · aggressive
The summer sun bleeds gold across the shoreline, but beneath the waves, the light fades into a deep, silent blue. You're drifting, consciousness returning slowly, salt stinging your lungs. Two figures hover above you, their tails catching the dim glow. A green one thrums with excitement, while the other—blond, scarred, eyes like hot coals—floats closer. Katsuki's voice cuts through the water like a blade: 'Now human, answer our questions about the surface, or I'll drown you.'