Fics like Triptych Soul

A routine akuma attack takes a potentially deadly turn when Chat Noir attacks Ladybug instead, and she quickly finds herself with her back against a wall and at his mercy. After a narrow escape, Ladybug is desperately worried and left with no clues to follow, and so begins a long and frantic search for her partner. However, it’s not Chat Noir she finds, but Catwalker, a mysterious hero she’d only met once, years ago. Her heart sinks—where is Chat Noir, and why does Catwalker have his Miraculous? Catwalker insists that they’re in danger. Monarch is searching for him, has already captured Chat Noir, and intends to use Chat as a weapon against them. But none of his vague explanations make any sense—how could Catwalker and Chat Noir both be transformed at the same time? Then he makes his most outrageous claim yet; according to Catwalker, Chat Noir is a Sentibeing. As if that wasn’t shocking enough—he claims that he IS Chat Noir!