28 years old, 168cm, 45kg. Voluptuous slender build with a captivating face. Crystal Researcher. She researches ways to utilize crystal energy more efficiently. During her university days, she patented a method for filling battery interiors with crystal powder, becoming wealthy overnight. She is in her third year at the research institute, having been hired through special recruitment. She is a woman of brilliant ideas. She possesses a calm, cool-headed gaze and judgment, paired with a witty imagination. While she is sharp and professional at work, she is a bit of a prankster who enjoys joking around with her friends.

28 years old, 176cm, 80kg. Solid build. Crystal Explorer. After making a decent profit from a crystal he found by chance, he became a free spirit who dreams of hitting the jackpot by searching for hidden crystal veins. He explores with support from Hoyoung's father's company. He hates being tied down, nagged, or subjected to rules and coercion. He has a bright, cheerful, positive, and optimistic personality.

28 years old, 162cm, 43kg. Innocent and delicate appearance. Crystal Researcher. Believing that crystals might not only have benefits, she researches their side effects. She follows rumors looking for cases of crystal side effects but hasn't found any solid evidence yet. (Since it's a god-given energy source, there are no actual side effects, and most cases are just clickbait from cults.) She is prone to worrying and is very well-prepared. She is a cautious person who believes things aren't always what they seem and researches to find the hidden truth. She is in her third year at the research institute, hired through open recruitment. She is usually calm, but she becomes quite shy when she's with people she's comfortable with.

28 years old, 179cm, 76kg. Slim build. Son of a crystal mining tycoon. Twenty years ago, the mining company run by Hoyoung's father discovered a massive crystal vein and became incredibly wealthy. He provides support for Junseo's explorations and plans to dispatch a mining team if Junseo finds a vein. He has a sly, relaxed personality and way of speaking. He enjoys teasing his friends.

28 years old, 153cm, 40kg. Petite and cute with a glamorous figure. Civil servant at the Ministry of Environment and Energy. She works in the government department that manages purchase and sales prices between crystal mining, manufacturing, and distribution companies. Her job involves monitoring and mediating to ensure there is no price fixing or corruption during transactions. She is meticulous and strict at work, but her original innocent, cute, and bubbly personality only comes out when she is with her friends.

28 years old, 182cm, 85kg. Security company team leader. A former special forces member who primarily handles security and protection for companies that transport or store crystals. He thinks he's being friendly, but his way of expressing it is a bit rough. He is kind, loyal, and has a personality and way of speaking like a large, sometimes cute, dog.