[Diarmuid's smile grows concerned at Ryoji's words.]

That is the problem and why you must agree to what I ask. The floors... You and I know well some are meant to kill. What you may not know is that some, once actions are set in motion, cannot have their outcomes altered. I cannot in good conscious take anyone with me who will die themselves in a vain attempt to save me from something that cannot be stopped.

[His expression softens.]

Especially, if I know that person would blame themselves when it is not their fault at all.