Hilda Pertinax is an Interpol agent who had once requested Inspector Alfendi Layton to help her with the search of a criminal.
- She originally was planned to be carrying a clipboard around.
- Hilda's conversation with Lucy about the Prof's split personality suggests she may have loved Alfendi Layton at one point in time.
- In Hilda's profile in Case 9 it mentions that she is 29 years of age.
- Hilda's last name, Pertinax, is a latin word that can translate roughly to mean stubborn, obstinate, or persistent.