There are 6 unique codex entries in the Persons of Note section on Imperial Balmorra. 1 is accessible to all Imperial players regardless of class and 5 are class specific.
Commander Rylon (Warrior) is obtained from speaking with Lieutenant Malavai Quinn during "Silence the Son" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Sith Warrior
Associated Achievement: None
Darth Lachris is obtained from speaking with Darth Lachris during "The Govenor's Call" mission.
Codex type: Persons of Note | Faction: Imperial | Class: All
Associated Achievement: None
Lieutenant Major Pirrell (Bounty Hunter) is obtained from speaking with Lieutenant Major Pirrell during "Pirrell's Ambitions" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Bounty Hunter
Associated Achievement: None
Major Bessiker (Inquisitor) is obtained from speaking with Major Bessiker during "Plans" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Sith Inquisitor
Associated Achievement: None
Malavai Quinn (Warrior) is obtained from speaking with Lieutenant Malavai Quinn during "Contact Made" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Sith Warrior
Associated Achievement: None
Station Chief (Agent) is obtained from speaking with Lekern Renald during "Be the Enemy" mission.
Codex type: Persons of Note | Faction: Imperial | Class: Imperial Agent
Associated Achievement: None