1) Captain Crawle is very worried about his leaving and about his wife. So he decides
to leave a lot of things that could be used to Rebecca.

2) Rebecca is only worried about his physical aspect and she is not worried about
her housband and about the danger he could have. She is very materialistic and
she is a calculating person.

3) Yes. Rebecca is a bad person.

4) Thackeray characterizes his characters by their description. Sometimes he gives
some personal comments because it is an omniscient narrator. He criticizes
Rebecca but he does this in a indirectly way. Rebecca is shown as a bad person
who try to be rich with hypocrisy.