In the last or next to last mission Exuberant says something to the tune of “He’s not a robot I thought you knew that” meaning that the Warden must be a Promethean that was composed, so my question is does anybody know or want to make a guesstimate about who he is. Personally I think it might be the Didact based on what happens in Escalation, but I want to hear somebody else’s opinion or if they know what is cannon for the Warden.
Robot implies the body itself, even if every body it uses is a robot the Warden itself is not. Just like Windows is your operating system, not the computer itself. Also almost all the explained AIs are sentient lifeforms whose brains where used to some level to create the AI (even the Forerunner ones). So by that he is 100% a “composed” individual, it being historic human or forerunner is up for debate (Guilty Spark was created from a human). There is even a chance the Ditact joined the domain the same way as Cortana and merged with the original Warden program.
But to the original point; is a drone pilot a drone themselves?
The Didact is definitely done for after escalation. Also it couldn’t be him since the Warden seems to have been around for a long time, not to mention having met Cortana before John killed the Didact for sure in Escalation. I don’t think there is enough information to guess his identity but I would assume he’s a Warrior-Servant Promethean or just an AI programmed with the duty of guarding the the domain like he mentions.
Warden Eternal is a damage sponge boss that is recycled multiple times within the campaign missions.