Jeremejevite has a medium sized body with two arms and an unknown amount of legs. She has periwinkle skin and four small eyes that are blue with black pupils, with the top pair being smallest and the bottom pair being larger. She also has a rounded nose and defined lip. Her hair is angular and is light blue with pastel blue and periwinkle accents. Her waist, legs, and entire lower body are currently unknown. Her gemstones are at the lower back of her head and on her left cheek right under her eyes, and they’re both light blue in color.
She wears a turtle neck that is white and has a dark Blue Diamond insignia with lighter blue and blue accents under it. She also has a small and short overcoat similar to that of Holly Blue Agate, and she has white gloves on with slits at the trim and three small blue diamonds on the backs.
Nothing is known about Jeremejevite's personality yet.
Jeremejevite possesses standard Gem abilities, bubbling, shapeshifting, fusion, regeneration, agelessness, and superhuman strength/durability.
- Electric Whip Proficiency: With the desire to discipline others, Jeremejevite can summon a blue whip with electrical currents running down it. The whip appears to have the same durability as Amethyst's whip since both are easily cut by Pearl's spear.
- Water Wings: Similar to Lapis Lazuli, Jeremejevite can summon water wings on her back to fly or evade enemies during combat. They have a noticeably sharper shape than Lapis' water wings, shaped like butterfly or pixie wings.
- Keen Memory: Jeremejevite appears to have very good memory, being able to remember the names of six humans without any lists, descriptions, or visual aid. In "I Am My Mom" Aquamarine remembered that the Diamonds didn't specify "alive" as a requirement for the humans. It's shown in the same episode that she takes great pride in this ability, calling her memory "perfect".