It is a rather impractical thing to cart around. Cain has mentioned teaching me some forms of defense that do not involve the sword, but we have not begun those yet. He mentioned they shall include "running away", but I am not yet able to run very fast.
[woops, he got a bit off-topic there. He clears his throat:]
Ken, it would be a pleasure to learn how to fight from you! The more self-defense I learn, the better-equipped I shall be to protect my safety in this prison. Er, will you still be here in a half-hour or so? That is when my lesson with Cain will end.
[he pauses and thoughtfully cups his chin (or, rather, where his chin would be, were he human)]
...Unless he calls an end to it early. That has happened. He does get these strange headaches, the poor man. Perhaps he is not drinking enough water?