A.
Samuel Longhorne Clemens, known by his pen name Mark Twain, fits this description.
✧・゚: *✧・゚:* *:・゚✧*:・゚✧
Hello!
✧・゚: *✧・゚:* *:・゚✧*:・゚✧
❖ I think Grayson didn't turn Maniac over to a doctor or a police because he might've wanted someone in his life. In the book it mentions how Grayson was alone and maybe he just wanted some company. Grayson also might've felt bad for Maniac because he was a kid who didn't have a home and was just roaming around.
~ ʜᴏᴘᴇ ᴛʜɪꜱ ʜᴇʟᴘꜱ! :) ♡
~ ᴄʟᴏᴜᴛᴀɴꜱᴡᴇʀꜱ
Answer:
They are thankful for Annes gifts even if not everybody gets along
Explanation:

In the English language, the word "who" is almost always used as a pronoun.
It represents a person, similar to the words "I" and "me".