User blog comment:NickFusi0n/A Theory on The Coordinate and The Wall Titans/@comment-25358468-20140522214517/@comment-10427184-20140524092643

@NickFusi0n The reason why the Titan that ate Eren didn't turn back into a human? This is just speculation, but I think it's pretty simple.

Eren was in the Titan when he transformed for the first time. Perhaps the Titan needed to digest him fully.