None-defining adjective clauses

"Alice in Wonderland, which is one of the most popular children’s books in the world, was written by Lewis Carroll, whose real name Charles Dodgson.

Carroll, who had a natural talent as a story-teller, loved to entertain children, (which or who included Alice Liddell) including Alice Liddell, whose father was a colleagues of Carroll’s at Oxford University.

One day Carroll took Alice and her sisters for a trip on the River Thames, which flows through Oxford. After the trip, Carroll wrote in his diary that he had told the children a wonderful story, which he has promised to write down for them. He wrote the story, (who or which ) illustrated it with his own drawings, and gave it to the children."

I have three questions:

1) Is the blue part the reduced adjective form of the bold part? and I don't know which one is correct? Who or Which?

2) is the red part the none-defining adjective clause as well? So, If we don't have none-defining adjective clause ,how should we put after the blue part? because the blue part comes between tow commas and everything I put after the second comma considered as none-defining adjective clause as well, How can I or the writer distinguish it? How can it be distinguished that it is extra or adding information or it is not extra information.

3) I think the pink one is a none-defining adjective clause. Then, how it is formed to the reduced adjective clause?

It is about story but the pronoun 'it' (italic one) is in the context as well?

Is it (which was illustrated) or (who illustrated)?