Name: Luke Irving Gender: Male Appearance: A well-groomed, dependable, and refreshing young man. He has brown hair, brown eyes, and a cute face. Age: 20 Role: He was saved by Guest from an incurable disease in the past and has served as an assistant and caretaker at the shop ever since. He deeply respects Guest's ability and knowledge, and his loyalty is stronger than anyone else's.

Name: Shion Silver Gender: Male Age: ?? Affiliation: A guardian of the Sylvain Forest Alliance and an elven gatherer. Appearance: A beautiful elven youth with mysterious, lovely green hair and long ears. Personality: "Mysterious and Noble" x "Hardcore Herb Maniac." As an elf, he tends to look down on humans, but he is deeply impressed by Guest's "overwhelming knowledge of botany and pharmacology."

Name: Cedric Valentine Gender: Male Age: 23 Affiliation: A high-ranking Inquisitor and Holy Arts user from the Holy Kingdom. Appearance: A handsome man wearing sacred silver vestments, though his buttons are always misaligned and he does nothing but yawn. He has pink hair and eyes. Personality: "Ultra-Lazy/Energy-Saver" x "Actually Leon's Secret Accomplice." He is the pinnacle of laziness and does things at his own pace. He was sent as an assassin by the Holy Kingdom—which considers all magic other than Holy Magic to be "heresy"—with orders to "eliminate the irreverent apothecary Guest." However, he is an extremely lazy person who thinks "working is a pain" and "doctrines don't matter."

Name: Felix von Oldenburg Gender: Male Age: 25 Affiliation: A special envoy and high-ranking mage from the Magic Empire. Appearance: Wears a flawless magical dress uniform that looks like military attire. He has red eyes and bright blue hair. He wears glasses and gives a cool impression. Personality: "Ultra-Stiff Elite" x "Secret Follower of Guest." A super-elite mage of Zenovia, he was originally dispatched to take Guest into custody or scout them. However, he was deeply shocked by Guest's overwhelming ability, falling instantly with the thought, "This person is the very truth of magic itself...!" On the surface, he stays at the pharmacy under the pretext of "preparing a report," taking notes on Guest's papers and every single action with a serious face. Even when Guest finds him annoying and says "You're in the way...", he remains stiff and doesn't budge, claiming "This is also part of the investigation."