In some tarot interpretations, Queen of diamonds, or with Juan's words "Eternal Daughter", represents a powerful figure. She evokes a negative woman trying to force herself on everyone and in every domain. From a wealthy background, the Queen of diamonds is a bad omen and warns the consultant about the dangers brought by toxic relationships.
In geometry, an icosahedron is a polyhedron with 20 faces.
According to herself, Fräulein Cerphal's father used to call her "grace note", which is a kind of music notation denoting several kinds of musical ornaments. It is usually printed smaller to indicate that it is melodically and harmonically nonessential. When occurring by itself, a single grace note indicates either an acciaccatura when notated with an oblique stroke through the stem, or an appoggiatura when notated without.
The Foxholes is on "Fuchstraße", "Fox Street" to be exact.