Does the Guvyer kill people or just aliens and monsters that are trying to invade ?

The monsters are actually humans who goes through a DNA modification to allow them to transform into a powerful monster form for combat. So pretty much he's killing humans. Like a lot of them. The normal monsters are called Zoanoid which the Guyver could pretty much kill with one punch. They are easily created and mass produce. The much stronger ones are called Hyper Zoanoid and are much harder to create so there aren't a lot of them. The Lost Number Zoanoid are one of a kind that can't be recreated. There's only been like 3 or 4 of them. Then there is the strongest Zoanoid, the Zoalord. The Zoalord can only be created with a crystal called a Zoa-Crystal. That Zoa-Crystal allows the Zoalord to control the Zoanoids telepathically. There is only 12 Zoa-Crystals on Earth. The company that creates the Zoanoid is called Chronos and every member of Chronos is a Zoanoid. The Chronos corporation is world wide. So 1/3 or 1/2 of the Earth's populations are Zoanoids. So basically The Guyver is fighting against the entire Earth. So to win this fight, The Guyver will have to kill a shιt load of people. The only other time you seen someone else kill that many people is when that person blows up the planet.