Sunglasses , headphones ( nothing playing- it’s just for show), sneakers , wear a mask , have location on phone , and something she can carry as a weapon in her pocket if necessary

Also , do not carry heavy back pack , or big purse. Be as minimal as possible .

Finally - ‘give her permission’ to make a scene if someone is making her uncomfortable, to get up and move , to not engage with strangers, and ignore people. If she’s anything like me ( and many other women) it’s been ingrained in our minds to always be polite, always smile back at people, it’s rude to say no, always make space for people etc ). Giving her permission to throw that out the window for her own protection and safety could save her life .