Anubis

Anubis was an Osiran worshipped in Egypt as the god who presided over rituals of the dead. Egyptian art depicted him with the black head of a jackal.

Son of Sutekh the Destroyer, Anubis tried desperately to avoid the path of death and misery that had fallen under his father. However, he would eventually begin to feel his father's presence in his mind, and he eventually lost the battle for control of his body. After Sutekh was once again destroyed, Anubis was resurrected and showed interest in becoming a companion of the Tenth Doctor.

History
Anubis and Horus led the procession that sealed away Nephthys on Earth ca. 5000 BC, with Anubis directing his priests and receiving the soul of Nephthys in the canopic jar with the image associated with him. (PROSE: The Sands of Time)

Peri Brown opened a canopic jar with his head and discovered a human organ inside much to her disgust. His name was listed in an Osiran grimoire associated with the forbidden cult of Kephri from ca. 2000 BC. (COMIC: The Curse of the Scarab)

A rare depiction of Scaroth depicted him being faced by Anubis and Khnum. (TV: City of Death)

Anubis' name was also used for a planet of jackal-headed humanoids. What connection they might have had to the Osiran was unknown. (TV: Curse of Anubis)

In the 21st century, Anubis came to Earth searching for a quantum harvester. He wanted to use it to build a gateway to follow his fellow Osirans to another universe. The Tenth Doctor convinced him to delay his plans for five thousand life cycles, since the gateway could have caused a ripple effect that would have destroyed the universe. Anubis left with Dorothy Bell, who had merged with the harvester. (COMIC: Spiral Staircase, Sins of the Father) However, he continued to make sure the Doctor was finding a way for him to reunite with the Osirans, by checking up on him in the TARDIS. (COMIC: The Singer Not the Song)

Anubis was mentioned in Gabby's sketchbook with a warning of the return of Sutekh. (COMIC: Cindy, Cleo and the Magic Sketchbook)

Anubis called the Tenth Doctor to the Shining Horizon. He asked the Doctor to go to Amenthes in the distant past to retrieve a scepter for him. However, while the Doctor and Cindy were gone, Anubis was possessed by Sutekh. He went to the central core of the Horizon, moving it in alignment with the Circle of Transcendence. He attempted to take back control, protecting Gabby and letting her escape. Sutekh overpowered him and continued to possess him, using the Circle to free many other allies that Sutekh had encountered in the void he had been trapped in. Anubis, still under Sutekh's control, sent Osiran service robots after the Doctor.

He left for the Garden of Osiris, where he prevented Cindy from paralysing Sutekh. He was almost killed, but barely survived. Gabby carried him with her block transfer powers, but he was teleported back to Sutekh when a dragon found Gabby and Cindy.

Rejuvenated
Dorothy Bell, before sacrificing herself to defeat Sutekh, managed to rejuvenate Anubis, making him younger but also erasing his memory. He greeted the Doctor and offered him some booji juice. (COMIC: Old Girl)

Spending many days together in the Garden of Osiris, Noobis refused to allow the Doctor and his companions to leave without him. Noobis believed that he could set up a Organic Power Interpolator to keep the Circle of Transcendence stable for a thousand cycles.

While in the Garden, the team were attacked and absorbed by a consciousness from an alternate universe which placed each of them into fictionalised virtual environments. Noobis was the first to discover how to break into the realities of his allies, and he possessed the form of a dog in Cindy's world and helped her unlock her real memories. Cindy used their connected to escape to the real world, where she discovered herself connected to a device while surrounded by dead copies of herself. As Cindy broke free of her constraints, the reality that her friends were trapped in broke down slightly, causing them all to remember her. (COMIC: Breakfast at Tyranny's)

Personality
Anubis claimed that unlike his father he was not vengeful, and not interested in dust and darkness but valued life. He never claimed to be a god, unlike Sutekh and Horus. (COMIC: Spiral Staircase, Sins of the Father)

After being rejuvenated by Dorothy, Anubis was in a much more positive mood and was a lot happier than he was previously. (COMIC: Old Girl)

Behind the scenes

 * The Fifth Doctor's claim that Anubis was king of the dead was contradicted elsewhere in the novel where Osiris is given the title. However, in the real world and in-universe this might refer to Anubis' role before Sutekh killed his brother.
 * was actually the god depicted on the canopic jar.