Commander Danvers

Commander Lana Danvers is a Rivet City security guard and Harkness's second in command. She can often be found one the 2nd or 3rd level of the tower or in the Rivet City Marketplace after the Marketplace is closed

If Harkness can no longer fill that role, she becomes the chief of security and takes his place in the Rivet City Ruling Council.

Related quests
You may need to speak with her to complete the Council Seat quest involving Bannon and Seagrave Holmes.