Cobalt was a member of the Horde.
Appearance
Cobalt is covered with fur, which is a constant turquoise. He has yellow eyes with no pupils, a small nose, elf-like ears and sharp teeth.
Personality
Cobalt's personality is blunt and rigid, fitting his role as a military instructor. He speaks deliberately and concisely, unlikely to engage in idle chit-chat.
Powers and Abilities
He does not seem to possess any powers. As a sergeant in the Horde, however, he has a great amount of authority over the Horde members of lower ranks, such as Cadets.
Plot
Origin of a Hero
Cobalt is a commander in the Horde who acts as a training instructor for the Horde's recruits. Adora, Scorpia, Octavia, and their respective squads are students in his class. Cobalt teaches a training session that is attended by Adora, Catra, Lonnie, Kyle, Rogelio, Octavia, and Octavia's team. For the session, Cobalt gave a lecture about Beast Island.
When Kyle interrupts him to ask for clarification on the kinds of beasts that reside on Beast Island, Cobalt snaps at him to stop asking questions. He is annoyed by Adora's giggling. He spends the remainder of the class listing all the infractions which would get one sent to Beast Island as a punishment.
Island of Magical Creatures
Adora remembers Commander Cobalt's instructions - while on watch, do it W.E.L.L.
W: Wait patiently at your post until you are relieved. Don't wander off.
E: Empty your mind. Don't let your mind wander, either.
L: Look for lights or movements in the trees. Keep your eyes on your surroundings.
L: Listen for unusual sounds.
Trivia
- His identity was confirmed in the book Origin of a Hero.