When her arm was pulled out and that cry of despair came out of her mouth, the only thing she could do was try to run. Her elf friends didn't even help, after seeing her friends losing their arm when approaching that child, they already know what that child is, what was left for them was to start running.
They didn't want to leave their friend behind, but it was the only thing they could do at the moment to survive, if they came back to help, they would end up dying too, everything they went through here would be in vain.
"Please help me." The human girl was getting weak because of the absurd amount of blood she was losing, so the only thing she could do was crawl on the floor while looking for some way to escape.
The girl thought her elf friends would help her, but the girls, even after hearing her cry for help, they totally ignored it and started running, she just could see her friends walking away while she was alone with that monster.