Their first appearance was when they were dressing for battle in Violete Yamir. Their second appearance was when they were bathing when they saw Pandora's battle Dokhan in sanctuary to protect the statue of Athena. Their last appearance was in the temple of Venus writing the names of people who had been "saved" by following orders Lost Canvas Lune Barlog, who knows what their real function, but apparently are only to be the servants of the army of Hades, or roughly as are the girls who are in the sanctuary so that would be their only function so far.