Confidence isn't Rey's strong suit, but combat and war is. She might not be dealing with typical fighters here, but she's hardly typical herself.

Besides, what happens next is up to Maketh.

"No, you betrayed us. For all your intent to do good for the Guard, you forfeited your authority over it the second you chose to overlook your 'asset' being a threat to the people its members are supposed to protect, and I've no doubt that Nick and Henry will agree." Rather than being dominated by anger this time, Rey forces herself to maintain a neutral tone, her visage unchanging through her clenched teeth. "And I refuse to let you run this place like your fucking Empire by allowing people to die like pawns played to further your need to have an enemy. It's clear to me now that your judgment has been compromised and you pose a risk to the city. I don't want to do this, but you're giving me little choice."

After all, there are people in here worth protecting. Not all of them are affiliated with the Guard.