Ephyra

Amphidera to Banten, a great recurved horned bear like creature, white like polar bear kin, a substantial protector

Names
Ephyra is sourced from the word being a juvenile sea jelly, but I just liked it

Physicality
Huge, white, with horns that curl back over her head, iron thick, and used by her kind to go to war, she is from the remote north where the jaya of the snow and ice treat often with bears in exchange for fish. She is large for her kind, and it makes it hard for her and Banten to always travel the same place, but she is always near

Grey
Ephyra makes a brief, unnamed appearance in the early chapters, visiting Banten between the bars of the prison, comforting him.

Personality and Traits
Never uttering a word in the book, she reflects the strong protective nature of Banten, only fierce in times of need, and also providing him comfort. He is well respected for his link of amphidera, which of course is not a choice but somehow said to be and important side of things to come

Powers and Abilities
Only in times of substantial need would Banten and Ephyra ever do anything but walk beside each other. They are powerful allies in combat, but are trained less for upfront confrontation and more anti-spy protective measures.