Question: what are the characteristics of a good girlfriend?
Answer: She's Loyal To You. This is a pretty fundamental requirement of anyone in a monogamous relationship. ... 
She's Herself Around You. ... 
She Listens To Your Problems. ... 
She Lets You Be Vulnerable. ... 
She's Got Your Back. ... 
She Shares Your Values. ... 
She Includes You In Her World. ... 
You Find Her Attractive.