What does Pip think of Herbert and Clara's relationship? What is her fathers real name and nick name ?

His nickname is "old Gruffandgrim." Clara's father's real name is Mr Barley.

Pip thinks their relationship is perfect.

"There was something so natural and winning in Clara's resigned way of looking at these stores in detail, as Herbert pointed them out, -- and something so confiding, loving, and innocent, in her modest manner of yielding herself to Herbert's embracing arm -- and something so gentle in her, so much needing protection on Mill Pond Bank, by Chinks's Basin, and the Old Green Copper Rope-Walk, with Old Barley growling in the beam -- that I would not have undone the engagement between her and Herbert, for all the money in the pocket-book I had never opened."