Let me know about some more lore and or if ya want me to do some research on it:)
tenno: a ancient race of orokin worriers (i gave the Tennos two different forms becouse they looked two human despite there race) they were blessed and cures with power and immortality during an accident in the void
Warframes: human subjects mutated through a specially engineered strain of the Infestation called Helminth.
Grineer: were once a caste of genetically modified, purpose-bred clones of the Orokin Empire. Programmed to obey their masters, Grineer slaves were tasked to perform manual labor, gathering resources for the advancement of the Empire.
The Dax were an elite fighting force who served the Orokin as their soldiers, bodyguards, and commanders. They were considered formidable warriors but were noticeably outclassed by Warframes.
In Duviri, skeletal-like imitation Daxes appear as the primary enemy force.
The Orokin was an ancient civilization that ruled over the Origin System in the distant past. During what was known as the Orokin Era, they built technological masterpieces that surpass even present day technology while exercising complete dominion over the known world. Although details about the Orokin are scarce, they are almost entirely responsible for the current state of the Origin System.
The Corpus are a merchant cult, built on the foundation of salvaged technology and robotics. They scavenge the outer systems, greedy for the Old War salvage. Their most sought after of all - the Tenno and their WARFRAME armor. Those captured are treated as salvage; meticulously dissected, integrated. The remains are sold to the highest bidder.