Species
The I-That-Is-We
When humanity (known as the We-That-Is-I) first made contact with the I-That-Is-We, there were..misunderstandings. The hive mind shared by the species was just as alien to terran researchers as the individuality enjoyed by humans was to the Hive’s drones. War seemed almost inevitable, especially in light of attempts to study the Hive’s apparent capacity for faster-than-light communication with its drones through invasive medical means. Were it not for the tireless efforts of Commonwealth diplomats, the two species may very well have become implacable enemies.

Now, the fates of Terra and the Hive are intertwined. Where once the minority of individuals who were unable to connect to the Hive due to genetic mutation or value drift were hunted and destroyed, now they I-That-Is-We found value in them as emissaries, or at the very least had a place to send them into “compassionate exile”, and humans likewise gained an important ally and strategic resource in the form of limited access to the Hive’s natural communications network.
Species Traits
Size. Drones of the I-That-Is-We stand around 4 feet tall. Your size is Small.
Speed. Your Base walking speed is 30 feet.
Adaptation. Each Drone is adapted to a specific role within the Hive. Choose one of the Adaptations below that best fits your character.
Neural Hub
Neural Hubs are the only Hiver drones (that is, drones still linked to the Hive) typically seen in the company of non-Hive allies. Because they are responsible for processing and allocating resources, they have a level of natural independence that most Drones within the Hive lack, though they still lack the sense of self that Hiveless and other species possess.

Ability Score Increase. Your Wisdom increases by 2, your Constitution increases by 1.
The Song of Songs. You have access to the great Hive of the I-That-Is-We. There’s no Hive Queen or central authority, only the constant, teeming press of your fellow drones spread across the galaxy and the Neural Hubs such as yourself coordinating this near-perfect democracy. You gain the message cantrip, a psionic ability. At 3rd level, you gain the ability to cast detect thoughts once per long rest, without the need for any components.
Engineer Caste
Hiveless Engineer caste Drones are a common sight in spaceports and only slightly less common on long-haul spacecraft. Their natural inclination toward repair and maintenance tasks, and their ability to operate independently in microgravity situations, makes them an excellent ship’s mate on any vessel.

Ability Score Increase. Your Intelligence increases by 2, your Dexterity increases by 1.
Natural Armor. Your armor class cannot be less than 11 + your Dexterity modifier, no matter what armor you are wearing.
Gliding Wings. You take no damage from falls and have advantage on all Athletics and Acrobatics checks to maneuver in microgravity. Starting at level 6, you gain a Flight speed of 40 ft. in normal gravity.
Binding Spittle. You have advantage on any check made to repair structural damage to an object or vehicle and can put out any fire that would deal 2d10 damage or less with a bonus action. Additionally, as an action, you can attempt to restrain a target by binding them with a spit attack. The target must make a Dexterity save (DC equal to 8+your Constitution modifier) or be restrained.
Soldier Caste
The Hive has always needed protection, either from the threats found on the worlds they have colonized, or from other species which proved less understanding of their differences than humans were. The soldier caste are created in times of trouble to provide the Hive with security. However, during eras of long peace, Soldiers with no war to fight are some of the most likely to become Hiveless, and so often turn up as mercenaries in human space.

Ability Score Increase. Your Strength increases by 2, your Charisma increases by 1.
Stalker. You are proficient in the Stealth and Perception skills.
Natural Armor. Your armor class cannot be less than 11 + your Dexterity modifier, no matter what armor you are wearing.
Bite. Your mandibles deal 1d6 slashing damage. On a successful bite attack, you may attempt to grapple your enemy as a bonus action. At 11th level, this damage increases to 2d6.