The corrupt mayor of the town. Atomic Rabbit overthrows him in the first issue. Afterwards, he becomes the title character's recurring nemesis who attempts numerous schemes in order to regain his position of power as mayor. So keep in mind this character does appear in future issues. He is accompanied by his two sons who assist him with his schemes.

The Fox is essentially a scheming cartoon villain in the vein of Wile E. Coyote and Atomic Rabbit is his Road Runner. But...given he has two sons he's also a father and has a sort of a wholesome quality to him. 

Use the following characters as references but I am open to other interpretations:

Wile E. Coyote (Looney Tunes) - https://www.youtube.com/watch?v=1Dajofh7yTs

Rintaro Okabe (Steins;Gate) - https://youtu.be/NAXT7BEUpIk?si=Vyfz5SNYAqNvlF3-&t=78