Sam

The manager of "Mr. S's Mystery Shop," the campus store at Night Raven College.

His shop deals in everything from raw eggs to magic stones, with most items listed as "IN STOCK!" He has a cheerful, friendly personality and refers to the protagonist and other students as "Little Imps" (sometimes adding an adjective, such as "Big Little Imp"). Incidentally, Floyd calls him "Sea-Horse-kun."

The shop itself has an eerie atmosphere, lined with items like masks and crystal balls, yet it boasts an extensive inventory. It occasionally gets crowded during sales events. This shop also serves as the in-game item shop.

He appears to have a wide network of connections—perhaps due to his line of work—allowing him to procure items like "Mystery Drinks" at low prices. It seems "secret associates" tip him off about what customers want, and he manages to provide even the rarest items exactly when needed. When it comes to business, he possesses enough negotiating prowess to wrap even the Headmaster around his finger—a moment where his villainous nature shines through. His uncanny ability to have exactly what is needed has led the Headmaster to suspect he might possess precognitive powers, though the truth remains unknown.

According to Lilia, he is knowledgeable about souls and spirits; Lilia himself is even said to have known Sam's great-great-grandfather.

Beyond his business dealings, he is skilled at playing the piano (a hobby of his) and fortune-telling.