Final answer:
In the book 'Illuminae,' Major Eli’s callsign is 'EZRA'. Callsigns add authenticity and depth to characters within the story.
Step-by-step explanation:
In the book Illuminae by Amie Kaufman and Jay Kristoff, Major Eli’s callsign is EZRA. Callsigns are typically used in military and aviation environments as unique identifiers for individuals or units.
In narratives, they can help create a sense of authenticity in the story's setting and are often used to convey character attributes or roles within the plot.
It is essential to pay attention to details such as callsigns as they can be an integral part of a character’s identity within a book.