at the “Kagetora” which the unhinged Naoe was preparing to ravish in the person of Minako?
At that point, Minako was still Minako, Naoe didn't rape Minako after transferring Kagetora's soul into her body, unless I've misunderstood your meaning.

In the novels, it's "I love you, Minako." Personally speaking, I find those words empty. Naoe might as well have said "I hate you, Minako" and it wouldn't have made any difference, considering what was going through his mind during the rape.