The one on the left is Navy Pearl. Her weapon is shock waves. She used to work for an agate on homeworld but then she teleported to Earth with a gem destabilizer (it's complicated and I haven't worked out all the details). Now she lives in a second barn with like 90% of my gemsonas. She's kinda friends with one of my gemsonas who's not on my profile, Star Sapphire, since they have a lot in common.
The one on the right is the personal pearl of my gemsona which represents me. She got separated from me when we landed on Earth and the Crystal Gems found her, now she's also living at the barn. She's curious about Earth and amazed that the Crystal Gems still are around. She doesn't know what her weapon is yet but she can summon a screen like the ones the pearls were writing and drawing on at the trial, she uses it to do math mostly.