Sentinel

Sentinel is a fey being, a Spirit Companion, who has bonded to many legendary heroes over the centuries. He is most famous for being the spirit companion of Gaius Lestrade, one of the five saviours. Sentinel often took the shape of a Bear, and was known for being stubborn, resilient, and honourable.
Sentinel was originally born to a Tylwyth tribe of Elves in the Umberlain Forest, under the name Dìonadair. His first companion was a brave warrior named Torsten, who he aided in slaying the foul demon who inhabited Umberlain. After Torsten's death, he received a vision of a demonic tyrant in Izir, and so headed East. In Zenekar, he encountered the Chimera King, a demon which possessed the kings of the nation. Dìonadair became bonded to the young prince of the nation, Azyor, who renamed him to Kadrakad. Azyor and Kadrakad together defeated and banished the Chimera, and Azyor became the new king. After Azyor's death, Kadrakad remained dormant for many centuries, guarding the prison of the Chimera.
This changed when Gaius Lestrade successfully passed King Azyor's trials, and proved himself worthy of being a companion of Kadrakad. Gaius renamed him to Sentinel. Together, Gaius and Sentinel, along with the other Saviours, managed to defeat Zaikerik the Betrayer. As he had before, Sentinel stayed by his companion's side until his death.