EXAMPLE:

My aunt Victoria was an adult. She impressed me a lot as a child.
WHO

My aunt Victoria was an adult WHO impressed me a lot as a child.

1.

She had a short plump figure. Her figure made it difficult to find attractive clothes.
WHICH or THAT

2.

In spite of this, she had a large wardrobe. I was allowed to help her select something colourful from her wardrobe. She would brighten up the dark day with something colourful.
FROM WHICH and WITH WHICH

3.

She had two habits. These two habits fascinated me and worried my mother.
WHICH or THAT

4.

Hanging from her mouth she kept a lighted cigarette. Her mouth was generously painted bright red or orange. The cigarette was never removed to embrace a child or to talk.
WHICH (twice)

5.

She was a great talker. Her favourite subject was the lives and loves of friends, relatives and neighbours.
WHOSE

6.

She recounted scandals to my mother. My mother tried to change the subject if she saw me listening.
WHO