my dorito
This far, Peridot has been shown to be cold and Machiavellian. She appears to be some sort of scout or technician, and takes her work seriously, crushing one of her Robonoids when it became damaged in her first appearance in "Warp Tour". In "Marble Madness", she shows herself to be slightly arrogant and does not have a high opinion of humans, and attempts to crush Steven with a giant hand after briefly questioning him. She is also somewhat like Pearl, in that they're both very intelligent and become easily flustered when their plans fail. When Peridot realized that the Crystal Gems were the ones that have been destroying her equipment, she quickly lost her temper and asked "Why do you keep destroying my things!?"

Peridot also seems to be very naive when it comes to Earth, especially when the information is not important to the mission, such as assuming that Steven's Crying Breakfast Friends! sticker was a sign to show that the Galaxy Warp had been compromised. She also believed that, while interrogating Steven, there were a species called "Stevens", just because he addressed himself by his name.
-From Steven Universe Wikia
on July 18, 2015