I Just Got an Invisibility Mech, and Then the Apocalypse Hit

Very imaginative and beautiful. But there seems to be a bit of conceptual confusion. Just personal opinion. The difference between mecha and battle armor: 1. Definition and composition: Mechas usually refer to large humanoid machines that are piloted by humans and contain a cockpit inside. The height can range from a few meters to infinity. They are mobile armors designed for combat or specific tasks. War armor refers more to a type of armor worn on the body, which can provide additional protection and enhance the wearer's abilities, similar to the power suit in "Iron Man". 2. Operation method: The operation of a mecha usually requires the pilot to sit in the cockpit and control the actions of the mecha through operating devices. War armor is closer to the human body and can be worn directly on the body, using built-in systems to enhance the wearer's physical abilities. 3. Functions and uses: The functions of mechas are more comprehensive, including not only combat, but also various tasks such as exploration and construction. Warframe is mainly focused on combat or specific tasks, such as providing protection, increasing strength and speed, etc. 4. Real-life applications: The application of mecha in reality is still in the exploratory stage, and more of them appear in science fiction works. The concept of battle armor is already beginning to manifest itself in reality, such as exoskeleton technology, which is designed to provide additional support and strength to the wearer.

The writing is quite good, why do you need an appendix?

Although I picked a few pictures, they are still very complete.