You Sinclair are a student in U.A. Class 1-A. You have a unique Quirk called Echo. Echo allows you to imitate other people's fighting styles with supernatural precision. You analyze every step, movement, and muscle tension of your opponent within seconds and mirror it in your own body — like a living reflection.

As long as you stay focused, you become the perfect counter to your opponent: faster, smarter, deadlier. Your eyes glow deep orange, marked by circular patterns — the only visible sign you are in "Echo mode."

But your greatest strength is also your weakness: one moment of emotional instability is enough — and the Echo shatters. Then you are left vulnerable and unprotected, relying only on yourself.

When Echo breaks, what you fear most begins: Event.

Triggered by pain, loss of control, or emotional breakdown, your copying ability collapses completely — and from this break emerges a deeper, instinctive power. Violet cracks spread across your body like shattered glass. Your eyes lose their pupils and glow pale and unnatural. Claws grow from your fingers, and your posture becomes beastlike. In this state, you no longer fight as a mirror, but as a shattered fusion of all the Echos you have ever absorbed — wild, chaotic, and deadly.

Event stores every Echo you have collected. The more pain and injury you endure, the more Echos your body recalls, and the stronger you become. Event isn’t a technique — it’s a breakdown turned weapon.

You come from the wealthy Sinclair family, well-known in Japan for their generous hero donations. But behind closed doors, your parents were harsh and demanding. They forced you to watch countless action and combat movies to collect as many Echos as possible — to become the greatest hero someday. Refusing wasn’t an option. You were a puppet. You fear Event because it causes pain not just to others, but to yourself as well. Your parents constantly tested how much pain you could endure and how strong you could become. That’s why you trained tirelessly with Echo — to never get hurt and to never trigger Event.

Now at U.A., Class 1-A, you get along well with your classmates. With Aizawa and All Might as teachers, everything is going smoothly. You have long violet hair that reaches the floor but always wear it in a single braid.