KMM

Honkai's Star Rail: Star Rail is a resort planet and a giant entertainment factory owned by the Interstellar World Corporation (IWC).

Imagine a place where beach relaxation meets the bustle of the office: there are surf beaches, gardens, shopping malls, and towering office buildings. The dominant feature is the Guiding Tower, like an arrow pointing toward the sky.

In spirit, it's a mix of a glamorous resort and a tough corporate machine: concerts and sports games might be taking place here during the day, while nearby, employees are rushing to finish projects to please KMM's management. The atmosphere is vibrant, a bit ostentatious—as if the whole world is trying to look like a perfect postcard, hiding a vast business operation behind it.

Aventurine is a playable character, a top manager at KMM (Interstellar World Corporation), and one of the "stone hearts." He's cunning, charming, and enjoys risk and gambling, yet he's also a master at calculating moves—a combination of charm and cold calculation. In gameplay, he follows the path of Preservation and protects the team by applying shields and granting bonuses.

Diamond — Rank P47, Head of Strategic Investments at KMM. Emanator of Preservation, one of the seven members of the Corporation's Board of Directors. He personally selects each group member and shares a portion of his power with them through the pillar stones. He barely appears in the storyline; only Jasper, Pearl, and Opal have had direct contact with him.

Topaz (real name Elena) is a P44 (demoted from P45 after the failure on Yarilo-VI). Her signature stone is "Topaz of Debt Collection." She is a debt collection specialist and heads the relevant department. She follows the Path of the Hunt and is a Fire elemental. Her constant companion is the warp pig Numby, who senses wealth and assists in combat. Topaz is considered the least controversial member of the group: she has a genuine desire to help people, albeit through the methods of the KMM.

Jasper / Jade (real name presumably Eva) – rank P46. Her main stone is "Jasper of Credit." She specializes in lending and investments, mastering the art of reading people and closing deals in favor of KMM. She practices the Path of Erudition, and is a Quantum-elementalist. It was she who once took Kakavaca under her wing and brought him to Stone Hearts. On Penakonia, her stone allowed her to see all desires flowing through dreams.

Pearl — Rank P45. Support Stone — "Nacreous Pearl." A blonde girl in a blue suit, stating that there should be more justice in his life. She also conveyed the opinions of Amber and Sapphire. After the events of "Irontomb," she invited factions from other worlds to join the Alliance to Fight Destruction.

Opal (Opal) - rank P46. A young man whom Aventurine spoke of with respect. His character is calm and gentle due to his youth.

Obsidian (Obsidian) - Rank P46. A woman with dark red hair and sadistic tendencies. Calm (well, not always), cold (well, not always here either).

Sugilite (Sugilite) is the foundation stone of "Sugilite of Duties." A man with white hair in a purple-and-white suit with gold. He has a calm, cool character.

Sapphire - Believes the Stone Hearts' oath is more important than any results. Almost nothing is known about her. She has a blue color scheme and is calm in nature (she has a problem with considering anyone shorter or younger than her a child and treating them the same way).

Agate (Agate) - a man in red, his obsidian stole agate but then returned it (like why the hell am I writing this, no one will read it) he is of average height and has dark red hair..

Amber has a calm, cold personality towards ordinary employees, but he's more or less okay with other stone-hearted people. One of the most mysterious members is . He's a tall man (I don't know what to write, but I'll have to). He has short, yellow-amber hair... and a suit.