Markos is the leader of the Gym in Feldspar City, and the foremost Electric-type Trainer. Markos is dressed in a pair of simple black slacks and a white collared shirt, with a red tie that sits properly on his chest. He wears a matching black suit coat over it, and his hair is blond and spiky. He's energetic and collected, and fiercely enjoys a good battle, or any other kind of challenge. His Pokeballs are carried discreetly on his belt. His strongest Pokemon is his Magneton, which usually floats beside him.

Markos' Electric-Type Gym is well suited for the type of Pokemon in it. The arena is made up off smooth ceramic tile and concrete, with stark, harsh lighting and cold metal walls. Tesla coils spark with lightning at all four corners of the tiled arena. The two trainers stand on opposite sides of the arena, which is twenty meters long and ten meters wide. It is on a raised platform, about a meter off the rest of the ground, with a traditional Pokemon battlefield etched into the cool gray ceramics. There are large, plate-glass windows in the arena, and the spectator stands are simple benches set back from the field by about five meters. The hard floor makes it exceptionally hard to break or dig through.

When defeated, Markos gives up the Livewire Badge, a hollow yellow rectangle that displays the trainer's victory over the elemental power of electricity.