Alynna Nechayev was a Human Starfleet flag officer during the late-24th century. She was a significant figure in Starfleet's dealings with the Cardassian Union and a fierce advocate of Federation security. She was Captain Jean-Luc Picard's direct superior but had a poor working relationship with him.
In 2369, while serving as a vice admiral, she ordered Picard to relinquish command of the USS Enterprise-D to Captain Edward Jellico, the latter having had experience with Cardassians in the past and having worked to establish the original armistice of the Federation-Cardassian War. She assigned Picard to a special operation to infiltrate a Cardassian installation on Celtris III. After Jellico's negotiations with Gul Lemec deteriorated, she authorized his actions against the Cardassian warships in the McAllister C-5 Nebula, at the risk of provoking open war and abandoning Picard.
Nechayev was promoted to the rank of fleet admiral in the year 2370, during which time she paid another visit to the Enterprise-D. Nechayev believed that Picard was too soft-handed in his dealings with Federation adversaries. She cited in particular his refusal to use Hugh as a carrier to introduce an invasive program into the Borg Collective. When she later commanded the Starfleet task forces assembled in response to the Borg attack of 2369, she ordered Picard to deploy the program should another opportunity avail itself. Picard tried making amends in 2370, offering her Bularian canapés to help her feel welcome aboard the Enterprise. However, his objections to her order removing the Native American colonists from the Dorvan V colony in the Demilitarized Zone left tension between the two.