Thinking in the Nea vs. 14th Memory thing… There is another fact that makes me think that it wasn’t Nea himself the one talking, not exactly.
Nea had no reason to call Allen a “mad puppet.” He literally had to watch Tim’s recordings to get an idea of what was on with Allen and his body and his life. How could he know before doing so that Allen was like the Earl in that regard? Even ignoring the katakana patterns, the actions before and after don’t match. Once you combine it with the katakana… Well, it makes me believe in the theory I’ve exposed even more.
Nea was basically awake, but given that he was hurt by Innocence (and how it seems to make the Noah Memory go berserk), his Noah doing most of the talking makes sense.