These aliens appear similar to humans, the only differences being two prehensile probosci and a somewhat enlarged nose. People of their species are rare, but they have an impressive lifespan that can last for over a millennium. They tend to behave like vampires. The proboscises lie coiled and hidden in pockets within the cheeks and can be extended to drain a victim's 'luck' or 'soup' by piercing the brain through the nose. The Anzati are capable of mild telepathic control to render their victims paralyzed, and are assassins of legendary skill. The Jedi hunting mercenary Aurra Sing was trained by these assassins, as was the Jedi Master Tholme. Their planet of origin has never been verified, as all sent to investigate the planet suspected to be Anzat are never seen again. Two more famous Anzati were Dannik Jerriko, an assassin of great renown who hunted Han Solo, as written in "Tales From Mos Eisley Cantina. " (Dannik Jerriko appears in person and actually demonstrates killing someone in Star Wars: Galaxy Of Fear: Ghost of the Jedi) and the dark Jedi Nikkos Tyris.
The Echani had anatomy similar to humans, but a common feature was that they had light skin, white hair and silver eyes.  They exhibited among themselves a remarkable sameness in body type and facial traits.  In comparison to their Echani conspecifics, the Thyrsians shared only few physical features, remaining Near-Humans never the less. Their look equated the exact opposite: the skin was dark instead of chalk-pale, the hair dark alike and not silvery. 
The Thyrsians were a branch of the Near-Human Echani , originated from the Inner Rim world  Thyrsus , with its differing culture and an opposite appearance. The Sun Guard arose from that people.