I'm pretty sure that's it with Harold at the moment.
I believe the battlefield Northcrest Guards are meant to be different than the ones in the field, thus the placeholder sprite in the battlefield at the moment. That said, I'm not sure of a place to specifically point out bugs and typos at the moment, heh.
For Tank, it is indeed based on 'how you dealt with him in the previous fight'. It would be cool to have more options with him, but I have a feeling there's a lot of characters to whom that applies on Hyao's plate at the moment, haha. ^_^
(You'd probably have to be extremely patient with him to explain a desire to change things around ;) )