Kallen had listened closely nodding some "well their demons, we don't really need to know why they've started to do this, they have destroyed what ever they wish in the past" he states reaching with one hand to grip his arm where his Dragon sin symbol was "All that matters is we take care of them, we can worry about the specifics later" he states 

"discover their route or pattern of attacks, and we should simply prepare the next possible target" he says looking at the other sins then at the general

"The Sins can easily deal with this" he grins, ever sense he became the dragon's sin, chosen thanks to his own background, he had became more and more ready for a fight, he knew what the sins could do and they could have enough power to deal with entire armies if they ever had to, or at lest the original could.