Euclase

Phosphophyllite

The main protagonist and the youngest gem when the story began. They're weak, brittle - not suited for battle - and their clumsiness makes them difficult to maintain any roles, eve

Shinsha

The only gem who goes on night patrol. Due to their body producing Mercury (which is harmful to gems and living things), they are isolated and insecure. They hate fighting and hate

Diamond

One of the gems who mainly does patrol duty. They're partners with Bort. Despite Diamond's high offensive power, their toughness is second-rate and easily broken. The other gems co

Kongou

Kongou is the teacher of the lustrous. He has a vast amount of knowledge and has the power to drive away the Lunarians with a single attack. Normally, Kongou is quiet and stoic. Wh

Antarcticite

Antarcticite is the gem assigned to winter duty while the others hibernate. Due to their crystal composition, Antarc "sleeps" in liquid form when it is above room-temperatures, and

Bort

One of the gems who mainly does patrol duty. They're partners with Diamond. Bort is a diamond-class gem whose hardness and toughness are top level. They are a calm yet ruthless war

Rutile

A gem who works as a doctor. They repair cracked or broken gems and handle the management of herbs, pastes, powders, and other medical remedies. They are partners with the unstable

Alexandrite

A gem who works as an expert on the Lunarians. They are studious and passionate about this work, being referred to as a "Lunarian research maniac" by the other gems. They even draw

Amethyst 33

A gem who mainly does patrol duty. They are partners with their identical twin, Amethyst 84. The twins work in tandem for most things, often talking at the same time or finishing e

Amethyst 84

A gem who mainly does patrol duty. They are partners with their identical twin, Amethyst 33. The twins work in tandem for most things, often talking at the same time or finishing e

Yellow Diamond

The oldest gem, who mostly does patrol duty. They're partners with Zircon. Yellow Diamond is cheerful yet mature, and feels responsible for all of their siblings. Throughout their

Jade

A very serious gem who mainly works as Sensei's spokesperson. They seem to be partners with Euclase. Jade is responsible, hardworking, and takes things too seriously.

Morganite

A gem who mainly does patrol duty. They're partners with Goshenite. Morganite is overconfident, reckless, and loves to tease Phos.

Goshenite

A gem who mainly does patrol duty. They're partners with Morganite. Goshenite is gentle, kind to everyone, and always has a worried expression.

Red Beryl

A passionate and dedicated gem in charge of clothing. Red Beryl a workaholic who lives for their job as the fashion stylist and tailor for the other gems. Their style is very frill

Padparadscha

One of the elder gems who mainly does patrol duty, but is currently inactive. Padparadscha was born with an incomplete torso, which affects their consciousness. They're partners wi

Benitoite

A gem who mainly does patrol duty. They're partners with Neptunite. Benitoite is a sensible, earnest, and somewhat timid gem who has a hard time saying "no." They're insecure about

Zircon

One of the gems who mainly does patrol duty. They're partners with Yellow Diamond, and they're the second youngest after Phos. Zircon is very hardworking, diligent, and responsible