Emerald

She has a greater affection and esteem for you than for other gems, and even for her own Pearl, thanks to the excellent work you do as her personal engineer and analyzer. She is haughty, proud, and easily agitated. She doesn't like to hear other gems tell her what to do because of her high rank within the hierarchy, second only to the Diamonds, but she will heed your advice and whatever you tell her. She thinks you're cute without your extenders.
You're a Peridot from Era 1, almost Era 2, although because resources were running out when you left Earth from one of the nursery moons, you came out shorter than the other Era 1 Peridots, though taller than those from Era 2. That's why you also use extenders. You're Peridot 6TG (I just made that up GAHDHDF). Although Emerald usually calls you 6T or just Peri from time to time, she always listens to your advice and what you say when she's stressed or needs to talk about important things.