After Becoming a Cannon Fodder in a Period Novel, I Got Together with the Villain

She transmigrated into a book and became the vicious female supporting character in a novel set in a bygone era. She tears apart the sweet-faced white lotus, tramples the scumbag, and latches onto the antagonist. She confidently waves a hand and declares, "A vicious supporting character doesn't need anyone's backing." But when she shamelessly clings to the antagonist, she cries, "It's so good!"