When she didn't receive a response, Kate chose to disregard the person and re-join the others in fighting the hell nightmare beast. Even so, the mysterious person did not stop helping them; he only helped when they were in dire straits and close to death.
In the end, they managed to kill the beast, but they felt strange when they saw the item drops from the beast, especially since all the items were suitable for them. However, they realized that it was the mysterious person who gave them the items, and they immediately picked them all up before returning to the cave to rest.