Alien (Battle: Los Angeles)

The Battle: Los Angeles Aliens (hereafter referred to as the "Blaa") are a caste-based species who launched a surprise invasion of Earth, most likely motivated by a need for a new home or colony. During the initial invasion, they used an atmospheric insertion, mistaken for a cluster of meteors, to deploy their forces.

Homeworld
While nothing has been stated outright, it has been implied in interviews that the world of the Blaa is a chaotic, possibly war-torn place and that the Blaa involved in the invasion of Earth may not be part of the dominant force there.

Physiology
The Blaa are divided into four known warrior castes, but there are likely more non-combatant castes. Analysis of the warrior castes' biology indicates that they are highly developed, sporting redundant arteries and other blood vessels. Their heads are actually entirely sensory organs; their brains are located in a cavity behind their hearts, directly attached to the spine. The Blaa have a large number of stem cells and platelets, enabling them to regenerate whole limbs that may be lost in combat.

All of the warrior-caste Blaa have substantial amounts of machinery implanted into their bodies, including communication, cooling, and weapons systems. Their perception is also very acute, supplementing their pre-cognitive and post-cognitive abilities.

Blaa Infantry Caste
The Blaa Infantry Caste can be identified by their lack of grasping hands; instead, they have a weapon grafted onto each arm. Their average height is about 8'1". As of the initial invasion, they are estimated to be the most abundant caste, numbering about 25 million in total. It appears that they are deployed in columns, lead by a non-specialized officer.

Like the other castes, the heads of Blaa Infantry soldiers are nothing but sensory organs. All of their vital organs are concentrated behind layers of muscle and arteries in the right of their chests. A cooling system is also integrated into their body, with a heat-dispersing fan located in front of their organs. Unlike many of the other castes, they do not have as much machinery located on their back.

Blaa Officer Caste
The Blaa Officer Caste is the easiest caste to differentiate from the rest, identifiably by their slender build and four mechanical legs. They are also the tallest caste with an average height of 9'4". The Officers are specialized in commanding groups of infantry, augmented by an unusually large, well-developed brain and very keen eyesight which has been supplemented with additional electronics. They are most likely the least numerous caste, as they number roughly 2,000,000.

The Officer caste have the most substantial amount of cybernetic enhancements. As their legs have been wholly replaced, they are able to move at speeds of up to 40kpm with relative ease. Their right arm has an implanted weapons system that trades firepower for accuracy, while their left grasping hand has been replaced by a mechanical claw.

Blaa Special Forces Caste
The Blaa Special Forces share many similarities with the General Infantry Caste, with a few notable exceptions. The Blaa Special Forces average about 6'11". The special forces appear to be a more intelligent Infantry soldier, expected to undertake specialized goals beyond that of simple shock troops. They also appear to be a middling caste, lacking the firepower of the Infantry and the intelligence of the Officer. While their strength is unknown, it is likely that they are between 25 million and 2 million in number.

Unlike the officer and infantry castes, the Special Forces have retained their left grasping hand and are able to make use of hand signals. Their weapons systems sport greater accuracy than those of the general infantry, but a less-powerful grenade launcher.

Blaa Intelligence Caste
The Blaa Intelligence Caste is likely specialized in their namesake, gathering information and laying down lines of communication. Averaging about 5'10", the Intelligence caste are the shortest and stockiest of all known warrior castes.

Unlike all other warrior castes, the Intelligence Caste lacks any integrated weapons systems. However, they retain the large amount of cooling and communications machinery grafted to their backs. The lack of weaponry is made up for by their ability to utilize both grasping hands. It is unknown how many Intelligence Caste members there are. The Intelligence Caste are also in charge of operating machinery and vehicles, such as driving ground artillery platforms and operating walking guns.