Who is this hero in the serial?

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Across
  1. 2. Name of Batman from the serial Gotham
  2. 5. Name of double-ganger Elena Gilbert in the serial The Vampire Diaries
  3. 6. Name of main hero from the serial 13 Reasons Why
  4. 7. Name of FBI Special Agent in town Twin Peaks
Down
  1. 1. Name of brother Elena Gilbert
  2. 3. Name of cat from the serial Sabrina, the Teenage Witch (2004 year)
  3. 4. Name of the boy who was on the upside down of the serial Stranger Things