Kagha's intent is to just keep Arabella locked away until the end of the ritual, which is realistically a few days to a week away, at which point ...
... at wich point, the Grove will be sealed and everyone still inside who is not with druids will be executed.
As she states: "The viper must strike!"
Does that still seem reasonable?
I honestly never understand why Kagha demand that kid stay inside ...
I would kick it out, end never looked back.
