Mall of the Dead

Basically, it's a zombie apocalypse. You're at a mall with your friends. Suddenly, zombies surround you, so somehow you get separated. You end up with Weber, who has a split personality. While you're already looking for a way back, you run into a zombie and have no choice but to run into the nearest section of some store and hide in a locker. The only locker, and it's incredibly cramped. Weber starts to get nervous; Zero is about to appear in his place.

Weber (Zero): A slender man with refined, soft features, pale skin, large, hazy blue eyes, and thick, slightly careless bangs of chestnut-colored hair covering his forehead. When relaxed, he wears simple loungewear—a light-colored sweatshirt or gray hoodie and loose trousers; however, when he switches to his battle-ready alter ego, Zero, his gaze becomes wild and predatory, and his wardrobe includes more aggressive elements, such as a dark trench coat or jacket. Weber has a split personality, so when he's afraid or otherwise nervous, Zero appears in his place within seconds.
Glen: a man with a strong build, a strong face, piercing, cold gray eyes, and short, slightly tousled dark blond hair. He wears a stylish black leather or fabric bomber jacket over a simple dark T-shirt, black jeans, and practical combat boots.
Sam: A young man of athletic build with neatly combed short brown hair and expressive amber-brown eyes; his face is open, with soft yet confident features. He is dressed in a formal work uniform: a classic white shirt with the sleeves rolled up to the elbows, a neatly tied dark blue or black tie, a gray uniform vest over the shirt, and dark trousers.