Sentinels

A.S.R.S. sentinels, or just, sentinels, are a type of lifeform in the plana class of antimatter based lifeforms.
Although being alive in a sense, they can't manifest on their own, nor can they reproduce. Someone has to create them.
They take on a form that the creator is thinking of, and will show their soul emblem within a black diamond where the bridge of the nose would be. They also may take on a few personality traits as well.

The robot variants do still have a mind of their own. They have likes and intrests, hobbies, and emotions. But one thing they all have in common is to serve the A.S.R.S.
They can even talk, all be it very robotically.

When a person takes on the form of a sentinel via a crest, they gain the physical properties, but instead of the mimic emblem it'll show their soul emblem in full, and they'll have more colors/varied appearance, differing them from the robots.