Senu is the animal companion that scouts locations for Bayek in Assassin's Creed Origins. Senu is a Bonelli's eagle, and players can control her flight to survey areas, mark enemies, and identify points of interest.
The eagle-scouting system expands the reconnaissance mechanics used by earlier Assassin's Creed protagonists. Instead of relying only on a synchronization viewpoint, Bayek can send Senu above a location and use her perspective to reveal guards, treasure, entrances, and objectives.
Senu is also part of Bayek's personal story. She accompanies him through the Egyptian setting and appears in gameplay as both a practical scouting tool and a recognizable companion. Her abilities can be improved through progression, making aerial reconnaissance more useful.
Senu is often confused with bird companions from later games. Ikaros belongs to Assassin's Creed Odyssey, while Synin belongs to Assassin's Creed Valhalla. Those animals perform related scouting functions, but Senu is the eagle associated with Bayek and Origins.