Do not speak like that. What is it about now that means you cannot be of help to anyone? Because you no longer have access to magic now? Because you are a soul and not a Servant? You still have a body to wield a sword in, Lancelot, and your mind is perfectly sane at the moment.

[How does she explain this? She chose him based on skill, not because of magic. Though she supposes that any mage stripped of magic would feel the same way. If she had not experienced being without her own magic before in this Tower, she would probably feel completely useless as well right now.]

The monsters here are still real. The people look different, but still need protecting. If you wish to help your Master you can arm yourself and defend him and others. We do not know if we can still be brought back while in this state which means they could be in very real danger right now.