Alexandrite
Gender:Non-binary
Hardness: 8.5A gem who works an expert on The Lunarians. Alex is studious, especially in terms of information and literature relating to The Lunarians. They will pester the other Gems for details regarding any fights or encounters with the Lunarians, especially if there is a new type of Lunarian. When referred to with honorifics, they hate being called Alex-san, preferring the cuter Alex-chan. This is changed to Alexi or Lexi in the official English translation.