THE TRUTH ABOUT GRACE! The heavily revised, "early Dan only had a vague idea" truth about Grace!
Truth #1 - That picture of Grace is inaccurate due to the placement of her tail. Granted, her tail has often been improperly drawn by simple virtue of the reality of where tails actually would be on her and how I generally expected people to react. I'm not the only content creator to worry about realistic tail placement. A book I once had on the history of Marvel Comics (at least I think it was that book) made special note to be careful when drawing tails (specifically on the character Nightcrawler) so as to prevent people from being smartasses about their placement.
Truth #2 - Grace likes acorns.