When no one visited Remira for an hour or so after her confession, though thorough her own words, she understood how incriminating and suspicious she sounded. And how weird it was that no one actually spoke a word after it.
But the silence was not enough for her. She understood that the Knights were probably leaving for the warehouse without her.
And Number two, that came here, confirms her suspicions. "You are not to move from here. That's the order I have received from the captain." She said such words, but it didn't seem she plans to carry the order properly, as there were various ways for her to take down Remira on her own without much trouble.
A lie while injecting muscle relaxants.
Giving sleeping pills.
And even lying about the time as well as date, giving Remira a false sense of perception, so that she doesn't do anything stupid.