User blog comment:Authoressofalifetime/How Low Eggman Can Go/@comment-679780-20180109155859

I think Eggman should of put Sonic into solitary confinement than a nice open cell.
 * Solitary confinement is regarded as "torture" even though it doesn't physically harm the prisoner.
 * Solitary confinement would be more torturous to Sonic given Sonic is a very physically active individual as well as values freedom of movement.
 * To go as far as an automated system as a jailor instead of Zavok would isolate Sonic from anyone else, thus he will have no one to feed his ego.

It would work ideally because this would leave no physical scars on Sonic. Once Sonic is freed and fight Zavok (who instead could be sent to stop Sonic than be his jailor) Sonic can continue as he is. (Any changes in behavior could be temporary due to prolonged isolation.)