Talk:Sentient/@comment-23.122.144.144-20160808034840/@comment-29580146-20160826045443

Both bodyguard and status symbol, the Wyrm Prime Sentinel was the last line of defense for high ranking Tenno in the Orokin era. - Wyrm Prime's Codex Description

The desciption for the wyrm prime seems to kind of contradict this. Perhaps sentinels are simply sentient or, as the op said, a lesser form of sentient that don't share the ideals/beliefs/ultimate goal of genocide that the regular sentient have.