Do not think yourself excused by any weakness, any natural defect of understanding on her side, in the wanton cruelty so evident on yours.
That Lucy had certainly meant to deceive, to go off with a flourish of malice against him in her message by Thomas, was perfectly clear to Elinor; and Edward himself, now thoroughly enlightened on her character, had no scruple in believing her capable of the utmost meanness of wanton ill-nature.
There are no more uses of "wanton" in the book.
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She is known for wanton behavior.
The ability to see beauty is the beginning of our moral sensibility. What we believe is beautiful we will not wantonly destroy.