Who are the three ladies and man Pip meets at Mrs. Havisham's?

These people are her relations, principally cousins, who try to ingratiate themselves to Miss Havisham in hopes of being the recipient of her financial legacy on her death. They arrive on her birthday (as well as other days) to give the impression that Miss Havisham is a fond relation with whom they just wanted to spend some time. They make their jealousy and resentment of Pip (whom they assume will inherit much of Miss Havisham’s money) clear each time he arrives when they are present. Of course Miss Havisham sees through this and has no intention to leave them any money. Matthew Pocket (Henry’s father) is the only relative who is not present, having confronted her years ago with the ridiculousness of her keeping up the charade of the grieving jilted bride. As such, he is held in higher regard by her and willingly helps Pip provide money for Henry to have the career he wants.