Ciallo means Hello, which consists of Italian Ciao and English hello. It is a greeting created by the heroine in Teak Club's work The Witch Banquet. Because of its magical pronunciation and novelty as a greeting, it became popular on the Internet and even appeared frequently in other works of Teak Club.

Ciallo often appears in the comment area of major comic dramas (referring to animated TV series and special photos serialized or completed in Japan, which are commonly used by viewers of animated dramas and animated films). When reading comics, comic fans will enter "ciallo" in the comment area to communicate with other comic fans, or forward "ciallo" expression packs to say hello.

With the popularity of ciallo, other works of pomelo society are also deeply loved by everyone, and the stem "grapefruit kitchen" is derived, because "kitchen" stands for "kitchen" in network language. I like something very much, so the fans of the grapefruit club call themselves "grapefruit kitchen" and promote it online.

Greetings created by characters in Teak Club's work The Witch's Banquet, combined with Italian Ciao and English Hello, also appeared in Teak Club's subsequent works A Thousand Flowers and Riddle Clown.