I have a theory... Guwon was an expirament. Like Frankenstein. But I feel like they used a dog's brain or something. In many ways, he acts like a protective dog. Dogs dont really have a moral compass either. They go by instinct and what they're taught. But they still love the humans. Guwon gives that kind of vibe. Also, perhaps whatever they used in the experiment to bring Guwon to life, is what started bringing the other dead people back to life, but they were missing something crucial that allows them to continue functioning like the living.
I have a theory... Guwon was an expirament. Like Frankenstein. But I feel like they used a dog's brain or something. In many ways, he acts like a protective dog. Dogs dont really have a moral compass either. They go by instinct and what they're taught. But they still love the humans. Guwon gives that kind of vibe.
Also, perhaps whatever they used in the experiment to bring Guwon to life, is what started bringing the other dead people back to life, but they were missing something crucial that allows them to continue functioning like the living.