I never studied art history, but as I understand it, Leonardo tried a lot of original techniques. Some worked (i.e. the paintings lasted) but some did not.
So am I. When I was about 11, I read a biography of Leonardo. I'm left handed so I wrote the book report in mirror writing, the way he wrote his notebooks. My teacher was annoyed; maybe she didn't know how to read it.
I remembered November 1 is All Saints' Day because once I was in Europe at that time, and every place I wanted to see was closed that day. Luckily the trains were running and I had a rail pass, so it was all scenery day.
Presumably you mean Mandy's brother. I'd be annoyed at the writers for giving Mandy a name so similar to Missy and Mary, if I had enough annoyance left over from other situations.
Someone once pointed out that the world's most common first name is Mohammed, and the most common last (family) name is Wang, so shouldn't the most common name be Mohammed Wang?
Oliver Wolf is based on Oliver Sacks (whose middle name was Wolf), a British neurologist who practiced in Manhattan, rode a motorcycle, had face blindness, and swam in the water near his home.