That would be weird looking to NOT make them as "bulky" or "chubby," simply because your working with one square here. If the characters in VX were native in two squares it would work fine. It'd be fine if you didn't use any RTP graphics in your game and only used 2-tile high characters. Otherwise, thick-thighed Jehuty it is.
Also, wth are you making, Z.O.E. RPG? I love Z.O.E. so much. Beat one the day I got it.
Then again.
Then again.
It was so amazing. Never beat the second one, one of my little cousins broke the disc and I haven't found another copy yet.