The Underdog characters

Axel Miller

Who they are: Mixed-blood teenager, protagonist.

In the story: In the year 2060, Axel Miller is a mixed-blood teenager living under the oppressive rule of the mutant-dominated Miller family. Despite being mocked and treated as weak by his half-brother Cody Miller and other family members, Axel struggles alongside his human mother to survive in a harsh world where mutants hold all the power.

First seen: episode 1 (free); also in episode 2 (free) and episode 3 (free).

Cody Miller

Who they are: Axel's half-brother, antagonist.

In the story: Despite being mocked and treated as weak by his half-brother Cody Miller and other family members, Axel struggles alongside his human mother to survive in a harsh world where mutants hold all the power. Cody initially demands that Axel be severely punished by having his hands cut off but is persuaded by Uncle Arthur to delay the punishment until after an important family trial called the ascendancy.

First seen: episode 1 (free); also in episode 2 (free) and episode 3 (free).

Uncle Arthur

Who they are: Family member, mediator.

In the story: Cody initially demands that Axel be severely punished by having his hands cut off but is persuaded by Uncle Arthur to delay the punishment until after an important family trial called the ascendancy.

First seen: episode 3 (free).

Victor Miller

Who they are: Family patriarch.

In the story: Axel's situation worsens when he defends his mother against insults, leading to a brutal punishment ordered by the family patriarch, Victor Miller.