Fiend Pro

The Fiend Pro is a former Chaos creature now under the command of the Prodeans. Much like the regular Fiend, the Fiend Pro will shoot either a charged projectile or two more intermediate projectiles. The Fiend Pro also has a melee attack and, thanks to its faster speed, it is more likely to use it. Although the Fiend Pro has more health and a faster movement speed, it is far less likely to shoot predictively, making it easier to dodge.

Fiend Pros are the most common member of Pro Chaos, being the first enemy the player encounters, and the only enemy fought in the Intro. A single one is seen at the end of Genesis Part 1, and they become regular enemies at the end of Marksman. The Fiend is the first enemy seen being transformed by the Harbinger. Fiend Pros, like all of Pro Chaos, tend to appear in the later half of the later levels, usually showing up after a rune is claimed and then later infighting with Chaos and Zombies.