Why is Clay on the tapes? What did he do to Hannah?
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13 Reasons Why: Everything You Need To Know About Clay Jensen

5. Why is Clay on the tapes? What did he do to Hannah?
While the others on Hannah’s tapes are there for specific actions against Hannah (sharing inappropriate photos of her, sexual assault etc), our protagonist explains that Clay is actually good and does not deserve to be on her list. "Clay, Helmet your name does not belong on this list. [...] You’re good. And kind. And decent. And I didn’t deserve to be with someone like you. I never would. I would’ve ruined you. It was me and everything that’s happened to me."