I can maybe see Peridot donning armor whenever going out on missions and using her metal powers both defensively and offensively. Aside from the obvious buffer armor serves, I imagine her being able to fly or levitate for short periods while wearing it (hence arranging the kunai in a wing-like pattern to further bolster the aerial theme). The kunai could be used either as tools or as classic projectiles, while the head piece can be snapped from the band and used as a last-ditch effort boomerang. As for the cloth and teal color, I see those as suggestions Lapis made. As for where Peridot acquired the materials to make the suit, she asked Amethyst if she had anything cool she wanted to give. And the general-like stars on her armor, were of course, Steven's idea!
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