[The crystal gems have just cut Peridot’s last limb off]
Peridot: All right, we'll call it a draw.
Garnet: Come crystal gems, let’s go home.
Peridot: Oh, oh, I see! Running away, eh? You crystal Clods! Come back here and take what's coming to you! I'll bite your gem offf!

What if her head is the only "Hologram, but with mass" that Peridot's gem has created
And her body is actually just some kind of mecha body that she uses to move around