Higuchi

Higuchi (樋口) is a female university student who lives near Sakanaka and a client of the SOS Brigade.

Wandering Shadow
Michael (Higuchi's dog) got sick with the same mysterious "ghost" which affected Sakanaka's dog, Rousseau.

The SOS Brigade cured both dogs at the same time, moving the "ghost" into Shamisen.

Etymology

 * The surname Higuchi means "gutter" (樋) (hi) and "mouth, entrance" (口) (kuchi/guchi).
 * Gutter is a shallow trough fixed beneath the edge of a roof for carrying off rainwater.

Trivia

 * Higuchi owns many dogs.