Cassus Optino is a history professor working for Pallida University. He has an office on the third floor of the history building.
He was mentored by Professor Lysandra Veltis before she retired, and he had access to her somatic password. He used it to help Hakur asked for Cassus's help to retrieve Marcus Renatus's notes from the University Library's restricted archives. Cassus now seems nervous about the incident, but Hakur wouldn't tell him what was going on.