Board Thread:Questions and Answers/@comment-173.24.147.12-20131103194042/@comment-29800728-20190402152157

Sheila is an AI and as we see in Season 8 when in recovery mode, FILSS (aka Freelancer Sheila) can comunicate with the Reds and Blues as demostrated by her talking to Epsilon.

We can assume that the tank roaming around in recovery mode is Shiela's AI avatar. As in it's how she'd appear if she projected herslef as a hologram, like Epsilon or Delta.