This barbarous, highly aggressive race of Vaygren demons have little interest in anything but satisfying their own base desires. They are utterly single minded in their lust for fighting, equaled only by their fondness for eating and sex.
They are prone to in-fighting and quarreling amongst themselves. A flowchart of typical Vyrus activity would be something like: excessive gangbangs > feasting > brawling (all interchangeable). They rarely are engaged by other Vaygren races in the realm, as they are difficult to live around due to their belligerent personalities and are left to their own devices.