Who is Miss Kinnian and how does she treat Charlie?

In the book Flowers for Algernon Miss Kinnian is the teacher where Charlie attends school at the college in a program for adults with disabilities.  She is also the one who recommends him for the experimental program based on his personality and his desire to learn.  Charlie has a lot of trust in his teacher and takes her advice.

After Charlie becomes more intelligent the two become attracted to one another.  Charlie would like to have a sexual relationship with her and the possibility arises but Charlie carries too much guilt from when he was mentally retarded and had been shamed about the idea of sexual feelings.  He shuts down his interactions with Miss Kinnian. 

Later, after Charlie ahs lost his intelligence and has returned to his normal IQ, he visits Miss Kinnian's classroom.  She is very sad to see the changes from the intellectual Charlie back to Charlie with an IQ of 68.