A bridge operations officer who took over Airiam's station aboard Discovery.
Lieutenant Nilsson is an operations officer on the bridge of the USS Discovery. She began appearing in the second season and eventually took over the bridge station of Airiam, who died during the mission to Section 31 headquarters.
Nilsson was played by Sara Mitich, who had played Airiam in the first season before that role was recast. Nilsson remained among the bridge crew as Discovery continued its missions.