The Second Legate of the Senate serves as an aide and assistant to the Senatorial Legate, either accompanying the Primary Legate on diplomatic missions, or undertaking diplomatic missions when the Primary Legate is otherwise engaged. The Second Legate is chosen by the Primary Legate, and has the power to speak for the Senate in diplomatic situations, though the Second Legate most always follows the directions of the Primary Legate. In some cases, sending the Second Legate to a diplomatic arrangement can be intended as a slight, often it simply means the Senatorial Legate had urgent matters to attend elsewhere.

The current Second Legate is Andariel Vokos, a female Patrician.