Describe Mr. Peggoty's character?

Mr. Piggotty is the loyal and trusted household servant to David and his mother when he was a young boy. David describes her as having "no shape at all, and eyes so dark that they seemed to darken their whole neighborhood in her face, and cheeks and arms so hard and red..." She is a large woman, and one of her defining traits is that whenever she hugs someone, buttons pop off of her dress, with the number of buttons lost corresponding to the strength of her hug. She is the aunt of Ham and Emily Peggotty and the sister of Daniel Peggotty. Together she and her brother are "Peggotty and Mr. Peggotty."