Obv Three hasn't gone thru all of its character development yet, but the current fandom take on it is that Three is a sociable softie who loves nature and learning.
Which is very adorable, and as textually supported as anything can be. But I propose:
--Three canonically tries to get SecUnit to wear its armor by pointing at it for two minutes without saying a word
--SecUnit canonically pulls a lot of things it says directly from Sanctuary Moon, which it has watched thousands of hours of, and Three hasn't
--Three is into documentaries and nonfiction
--Three is used to working with other SecUnits
Thus,
Three rarely speaks, but when it does, it's basically *David Attenborough voice*. When Three and SecUnit are working together and SecUnit forgets to tell the humans what it's doing, Three (who hasn't said a word in the past six hours) suddenly says, "Your SecUnit is currently attempting a hack on nearby drones. This has a high probability of success, but there is always the chance that these drones have had their security features altered. ...and there, these drones are now under our control. Our path forward is clear, but we will continue to use caution," like it's narrating Blue Planet
