I would add, a woman WITH CHILDREN.
I would also suggest, from personal experience, that children be taught to go into a store and tell an employee they need help.
I was once followed as a ten year old child by a group of scary looking teenagers. I went into a store and told the man working there what was happening. He gave me the phone and told me to call my parents. Any place that’s populated where others can see the presence of the child and their interactions with adults is ideal.