@Zephyr247 They probably are afraid that they will hurt her and get on Zacks shit list, he probably became overprotective after that ordeal.
They also may fear that them approaching her will be seen as them pitying her or seeing her as weak and in need of protection. I imagine the mindset of adventurers has a big "I'm not a weakling" component to it. Seeing as she is definitely seen as an accomplished adventurer the others will likley assume she thinks somewhat similarly.
Lastly, and sadly possible considering how many people act, she could now be seen as "Used/Damaged Goods". Considering how rumors spread and grow out isn't a stretch to think that many people assume that she was raped when she was worth the dickbag party. Just gotta go to the comment sections of any manga whose female lead isn't a virginto see how a large number of people act/think.