If I can remember correctly, chickens are capable of recognizing at least 50 people. And they will act differently depending on how they feel about you. I guess you are special to her!
The true recommended space is 4 square feet inside the coop and 10 square feet of run per bird. However, all birds and situations are different. You may be able to get away with less than that or not.
I say do your best and adjust as needed. Chances are she will enjoy having a friend more than an extra foot of lonely space.

The true recommended space is 4 square feet inside the coop and 10 square feet of run per bird. However, all birds and situations are different. You may be able to get away with less than that or not.

