I believe that the two sentences (apart from one with the brackets) are correct. So, those would be:
1. <span>Daniel, that guy with the hair, is sitting at the end of the hall.
2. </span><span>Daniel—that guy with the hair—is sitting at the end of the hall.
Using commas and dashes to separate the appositive phrase from the rest of the sentence is grammatically acceptable, whereas using brackets is not.</span>
This isn’t an essay but this is a part. Giles says that Proctor does not believe in witches. Proctor denies having stated an opinion on witches at all and leaves Hale to his work. Parris relates the tale of finding the girls dancing in the forest at night, and Mrs. Putnam reports having sent her daughter to conjure the spirits of her dead children.
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The third option sounds the best.
