Transmigrating Between Two Worlds, I Became the Dark Overlord

(Major rewrite coming soon; the remastered version may return next year) [No romance + strong female lead + ensemble cast] She emerged from the ruins, rose in the darkness, and kept watch before dawn. When darkness falls and the people are gripped by panic, will a firefly's light lead them forward? Who would be willing to become that light? He Su was a girl with severe social anxiety. By a twist of fate, she found herself in another world. In her own world, light was the most precious resource, but in this one it was everywhere, as if it were free. What's more, she could travel between the two worlds, slaughtering her way through the dark one while living in comfort in the world of light. She might look expressionless, but in truth she had no idea whether to laugh or cry. She might seem quiet and withdrawn, but in truth she was afraid to speak to people. She might always be seen from behind, but in truth she didn't dare look people in the eye. That was the kind of girl she was: quiet and socially anxious, afraid to talk to people, and even more afraid to meet their eyes, especially when they were outgoing and eager to chat with her. Night Walker No. 1: “Really? I don't see it.” Night Walker No. 2: “Exactly! She's a monster who kills without batting an eye. I don't get it!” Night Walker No. 3: “A gentle, quiet, shy girl with social anxiety? That's slander. We may not be human, but even we won't accept that label. She should be called a cold-blooded demon lord instead.” He Su might be socially anxious around humans, but she has no qualms about treating nonhumans as, well, not people. After all, they aren't human... P.S. Su is really socially anxious, so don't bully her.