Artificial humans were created by the ancient race of the Senshi civilization by using artificial bodies and
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Core Crystals. The artificial humans may be artificial but their bodies are very close to the real thing, to the point that they can even have children. Kenshi's mother Rea Masaki is one and is originally from Geminar. Two artificial humans on Geminar are Doll and Neizai One/Ulyte Mest.
If killed, Artificial Humans memories and personality will be stored within their core crystal, which can allow a new body to be built for them. After Gaia went berserk, Artificial Humans were implanted with mechanisms to control them, which will be passed down to any children they may have.