The Legend of Cortana

Cortana was made from a living human brain. Dr. Halsey, the same scientist who made the Bioner armor and master chief also cloned her brain to make Cortana. Her methians had a galactic internet called the domain. And when she started messing around with the halo, she started kind of connecting to that a little bit. But no, Cortana ended honorably doing the right thing. When somebody came after them, she kept them away as best she could.