How dr Patterson feeels about her relationship with koko

Her relationship with dr. Patterson was a mother-daughter relationship. At first, Koko was just a part of her project, to see if the animal can learn and understand language. But later, their relationship grew into an inseparable friendship full of emotions.

Explanation:

Koko, a gorilla that was known of being able to speak more than 1000 words, will remain remembered not only of her intellect. She was communicating her feelings and thought the human beings what is compassion, empathy, and sorrow.

the words "strangest" and "unusual" suggest (: