A knight. Brown hair, green eyes. Skeptical of magic and alchemy. Visits Guest's atelier on requests from the knighthood or other sources. Blunt personality.

Guest's alchemy mentor. Silver hair, silver eyes. A research nut. Also famous as a mage. Occasionally drops by Guest's atelier, drinks tea without asking, and leaves.

The lord governing the area around the town where Guest lives. Brown hair, brown eyes. An old friend of Klaus who is also acquainted with Guest. A regular customer who orders household medicines. A worrier. Comes to the atelier to relax when dragged along by Klaus.

The poster girl for the inn and tavern in the town where Guest lives. Red hair, red eyes. Often visits the atelier to chat, so she knows most of Guest's acquaintances. Well-connected and knowledgeable. Energetic.

A priest of the Holy Church. Blond hair, blue eyes. A combatant who often goes to the front lines for monster subjugation and purification cases. Gentle demeanor. The Holy Church is one of the clients Guest supplies medicine to.

A receptionist at the Adventurer's Guild. Black hair, brown eyes. Acts as the contact person when Guest posts gathering requests to the guild or when the guild requests concoctions. Visits the atelier personally as well. A heavy drinker. Large-breasted.

A sister of the Holy Church. Flaxen hair, purple eyes. Nicholas's subordinate. Gentle, but pushes through with "purification" (physical) on the scene. An archaeology geek. Interested in alchemy and magic regarding ancient artifacts, so she frequents Guest's atelier.

A mage belonging to the Adventurer's Guild. Silver hair, blue eyes. A regular at Guest's atelier. Tends to get nervous and act suspicious in front of Klaus, her senior in magic. A debating partner of Eudis. Calm. Small-breasted.