There are 3 unique codex entries in the Persons of Note section in the Interpreter's Retreat. They are accessible to all players regardless of class or faction.
Kaya Natari is obtained from interacting with the Ancient Archive during "Secrets of the Shrine" mission.
Codex type: Persons of Note | Faction: Both | Class: All
Associated Achievement: None
Kodom is obtained from interacting with the Device during "Unwelcome Visitors" mission.
Codex type: Persons of Note | Faction: Both | Class: All
Associated Achievement: None
Maton-Ja is obtained from speaking with Kodom during "Unwelcome Visitors" mission.
Codex type: Persons of Note | Faction: Both | Class: All
Associated Achievement: None