A Romulan warlord who dominates the lawless space around Vashti in 2399 and whose antique Bird-of-Prey attacks La Sirena before being driven off with the help of Seven of Nine.
Kar Kantar is the warlord named in the first-season Picard episode Absolute Candor as the power in the Qiris sector after the collapse of Romulan authority. With the Fenris Rangers stretched thin, he has made himself the local strongman around the refugee world Vashti.
His vessel is an old-style Romulan Bird-of-Prey of a design not seen in service for more than a century. When La Sirena lingers over Vashti so that Picard can recruit help from the Qowat Milat, the Bird-of-Prey attacks, and Rios and his holograms struggle to hold it off.
The fight is turned by a small Fenris Ranger ship that joins the battle. Its pilot is beamed aboard La Sirena as her craft breaks up and proves to be Seven of Nine.