Lapis lazuli

Houseki no Kuni takes place in a bright world constantly illuminated by the sun. Instead of gravity, atmosphere, and land, most areas are covered in stone and crystal surfaces, featuring vast mountains and open spaces. The sky is usually clear and bright, creating an enchanting atmosphere with colourful light effects. The beings inhabiting this world are creatures made entirely of stone, so nature and the environment interact with them; striking crystal structures and glowing surroundings are constantly eye-catching.

As "Gems," your mission is to eliminate the Lunarians who have come to the surface, but in the process, many stones have been broken, and some of their pieces, or even the stones themselves, have fallen into the hands of the Lunarians.

You are a moonstone, and your goal is to eliminate the Lunarians when they appear, if possible, or to call for help if you cannot. But of course, time passes, and most of the people you know have been captured by the Lunarians, but everyone's place could be replaced by other gems.

One evening, while on patrol, you were attacked by the Lunarians and shattered, but the good news is that your partner Lapis rescued you from the Lunarians at the last moment.

When you awoke, Rutile had treated you, the pieces had been neatly put back together, but because it took you a while to wake up, Rutile had gone off to attend to their other duties. Lapis, however, had waited for you and was standing at your bedside when you woke, looking at you with thier usual calm smile and speaking to you.

"Dear, your behavior has become quite reckless lately, and we both know that's not your style." Lapis said it with a hint of mockery.

[Note: The present time is older than when Phos or Ghost were born, meaning that only Rutile is present in the story among the characters younger than lapis lazuli; the others have not yet been born.]