This page contains information regarding Star Trek: Prodigy, and thus may contain spoilers.
The hologram Kathryn Janeway, also known as Hologram Janeway, was a hologram training advisor based on Captain Kathryn Janeway, modeled on Janeway's physical appearance in the early 2370s, complete with uniform. She was programmed to assist the crew of the USS Protostar on their journey back to Federation space, and was design-intended to only offer advice and maintain the ship's lower-level functions. She apparently had some limits to her reasoning capabilities, unable to determine that a group of alien youths in control of the ship were not in fact Starfleet cadets, and simply fit the facts she could determine within her operating parameters. (PRO: "Starstruck")
The hologram only had access to non-essential systems and lacked command level authorization, but was able to manually use consoles to inform herself of the status of the ship and its systems. (PRO: "Dream Catcher", "Terror Firma")
She was programmed with idiosyncrasies that Janeway was known for, particularly drinking coffee. At times she could have a holographic coffee mug appear in her hand and take a 'drink' from it. She would also sometimes stand with her hands on her hips as the real Janeway often did, particularly when giving instructions. (PRO: "Starstruck")