The Swarm (Voidtrain)

The Swarm is a collected term describing a species of insect-like creatures found within a specific habitat of the In-Between known as Arenas.

Physical Appearance
The Swarm insects are fairly large creatures, and are fully terrestrial. Overall, the species are quadrupedal, with four main limbs for locomotion, though some species do have extra limbs for other uses on further study.

Soldiers
The Soldiers are the more commonly known species of Swarm insects to be found. They have three sets of limbs, though one of these are used for combat rather than locomotion, giving it a centaur-like appearance. Their bodies are covered in an armor-like carapace, which acts as a efficient protection against predators. This kind of armor grows with age, and the older the Soldier is, the more prominent and efficient the armor becomes.

Soldiers are capable of spitting up a bile at enemies if prompted to, though these are more adapted to closer combat thanks to their frontal limbs and sharpened teeth. They commonly attack in large groups, though some studies had shown they are capable of adapting to the situation - attacking in solo if the situation demanded it as opposed to swarming all at once.

Spittle
Spittles are a more specialized insect of the Swarm, more adapted to far-ranged combat as opposed to frontal assaults like the Soldiers. They are fully quadrupedal, with specialized yellow fin-like membranes behind the head as a means of differentiating it from standard soldier insects.

Spittles are especially intriguing since they've shown signs of great memory and adaptability that surpasses Soldiers: when in combat they will keep themselves distanced and attack with bile weaponry. However, they will retreat for protection behind cover if faced with Humans with similar weapons. Whether or not this suggests sentience within this species has yet to be confirmed.