Draining Simians were one of Nocturna's few gentle indigenous species. Given their playful nature and their diet of plants and mosses, they inspired predator-fear among no sentient creatures. But the Darkspore mass-mutation of Nocturna's biosphere twisted the simians into parasites. They feed from the biochemical/energetic "life force" of their hosts, quickly satiating themselves and retiring for naps, leaving their victims to die.
Draining Simians will hop around as if nothing was happening, but as soon as a hero or its pet is sighted, the Simians will leap to the hero and start draining them of their life. They must enter melee range in order to use their "life leech", and channel for the whole duration. However, they can keep the stream of necrotic energy stable over a distance of a few meters, until the stream breaks, and they have to recast their Drain. Channeled abilities won't be helping, unless they're immobilizers. A good hero of choice is Sage. His Dendrones can distract the Simians away from him, while will continously shoot the Simians to death, while healing the Dendrones in the process. Blitz in another good hero. With his Plasma Wreath, he could resist most of the Drain, while zapping the Simians that are attacking him.
- Despite their names giving the impression of being mammals, their bulbous eyes and mandibles give an insectoid appearance. But then, they are aliens, and mutated ones at that, so Earth classifications don't apply well. Another ironic fact about their name is that they do not get healed from the health they drain.
- They have the same hands as Sage and Viper.
- They have Wraith's feet.
- Simians didn't actually appear In-game untill BETA test 3. Before then, they would not spawn on levels.