One very large plot hole between both the anime and manga has to be how attaching a soul to armor can allow the armor to move and speak.
Al, The Slicer Brothers, Barry and those armored suits in a flashback (anime only I think) are fully able to move without any muscles and are able to talk without vocal cords.
So how do you think they do it? Someone once told me that they think Al's soul is using telepathy to move and talk but that doesn't really fit well with a series about a special kind of science.
I thought this discussion would fit best under this forum since it concerns a few characters and not any particular series.
Anyone have a theory they like to discuss?