Daily Life at Hogwarts Chapter 1500: Clearly
"Don't worry about fairies."
Hermione certainly understood what Harry was saying, but she was more worried about Harry's attitude towards the invasion of Gringotts than the goblins.
Harry should be more confident in the plan they made. After all, the three of them will have taken the Felixir and are fully prepared. There is no need to worry about the failure of the plan. Even if the plan does fail, they can still use it. Prepare in advance to get away safely.
As for the plan
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