Senu is the bird companion of Bayek, the protagonist of Assassin's Creed Origins.
Senu is a trained eagle who helps Bayek scout locations from above. Players can use her to identify enemies, mark points of interest, locate objectives, and survey parts of the ancient Egyptian landscape before entering an area.
Origins used Senu to support a broader shift in the series' exploration design. Rather than simply climbing a tower to reveal a fixed map, players can actively inspect locations and gather information with a living companion. Senu also reflects Bayek's connection to the natural world and his work as a Medjay.
Ikaros belongs to Assassin's Creed Odyssey, while Synin is the raven companion in Assassin's Creed Valhalla. Bayek is the human protagonist, so that name is not the answer to a question about his eagle.