アレキサンドライト, Arekisandoraito
from Land of the Lustrous
Origin
Earth
Alexandrite is one of the Gems who works at the School as an expert on Moon People. It's unknown whether it's a job or hobby, but they're obsessed with the Moon People. Kongo-sensei forbids Alexandrite from seeing the Moon People as it causes them to go into a battle frenzy. They are one of the elder gems. (Moon People maniac. Call them Alex-chan)
Land of the Lustrous
In the mysterious future, crystalline organisms called Gems inhabit a world that has been destroyed by six meteors. Each Gem is assigned a role in order to fight against the Lunarians, a species who attacks them in order to shatter their bodies and use them as decorations. Phosphophyllite, also known as Phos, is a young and fragile Gem who dreams of helping their friends in the war effort. Instead, they are told to compile an encyclopedia because of their delicate condition. After begrudgingly embarking on this task, Phos meets Cinnabar, an intelligent gem who has been relegated to patrolling the isolated island at night because of the corrosive poison their body creates. After seeing how unhappy Cinnabar is, Phos decides to find a role that both of the rejected Gems can enjoy. Houseki no Kuni follows Phos' efforts to be useful and protect their fellow Gems.
