yes.
yes.
what would they do next?
Kyrie, in the beginning is the damsel in distress... but!
Since Credo died, she should take his place as the new leader of the army and starts wielding some weapons even her brother's sword.
I can see in Dante's bonus ending, Nero comes in for a visit and Kyrie shows up with a new brave and hot her.
Personally, I don't see why Kyrie needs a bunch of weapons to make her hot or brave or strong.