Saiyajin--Saiyans
Saiyans (サイヤ人, Saiya-jin) are a naturally aggressive warrior race who were nearly all obliterated by Frieza before the start of the Dragon Ball series. They play a central role in Dragon Ball Z and Dragon Ball GT, once it is revealed that the protagonist Goku is actually a Saiyan who was sent to destroy Earth.

- All full-blooded Saiyans (such as Raditz, Kakarot, Nappa, Paragus, Broly, or Bardock) have names that are pun on various vegetables.

The Saiyans possessed a powerful military, the Saiyan Army (named only in the FUNimation dub). As of Age 737, the Saiyan Army was under the command of Nappa (also stated only in the FUNimation dub), who was its most powerful general. The Saiyan Army was employed under the Galactic Frieza Army, in which the tyrant would use the Saiyan warriors to conquer planets for him. The army employs various ranks based on power levels: the only ranks mentioned in the series are "Elites" and "Low-Class", with the series creator Akira Toriyama confirming in an interview that there are also "Mid-Class" warriors; almost all Saiyans are low-class warriors, there are about ten mid-class warriors, and only King Vegeta and Prince Vegeta are elite warriors.[4] This rank is determined by an innate latent battle power, but naturally, if their battle power rises greatly afterward, they can be promoted. The military force met its final destruction when Frieza committed his Genocide of the Saiyans, with the force's only survivors being Vegeta, Nappa, and Raditz.
Saiyans are outwardly very similar to that of Humans, with the exception of their monkey-like tails and have larger muscular builds. They are commonly seen to have deep black hair although there have been rare occasions when they have also been shown to have brown, blue and blonde hair (in the anime). In addition, they seem to possess large hearts, as evidenced by portions of Bio-Broly's heart shortly after he was drenched in the Culture Fluid.

The Saiyans also have great speed and agility. They also have much faster reflexes than an average Human; reflexes so fast that they can avoid a bullet without much of a problem. Super speed can easily be seen in their fighting skills; their movements occur in fractions of seconds which are not visible to average Human eyes. Their agility is also substantial in their battles and training. These movements can be improved by training, transformations, and other methods. These natural powers of speed and reflex make nearly all Saiyan hand-to-hand combat very fast. The strongest Saiyans can move so quickly that even King Kai, who can easily track Attack Ball's traveling at Faster-than-Light speeds, can't keep up with them.

Saiyans are considered for the most part to be of comparable intelligence to humans. Goku's head trauma and sheltered childhood left him unenlightened about anything not concerning martial arts, though he gradually outgrows this as his teachers all stressed the values of brains over brawn.