خانواده ای متشکل از انسان هایی با توانایی های شگفت انگیز که در سیاره ای دیگر در حال زندگی هستند و رهبر آن ها نیز بلک بولت نام دارد. طولی نمی کشد که انسون (برادر بلک بولت) را غرور فرا میگیرد و او خواهان تصرف زمین است. او به برادر خود خیانت می کند و برادرش به طریقی موفق می شود به عنوان اولین عضو خانواده به زمین سفر کند. بلک بولت دارای صدای مخربی است و نمی تواند صحبت کند تا اینکه راه حلی برای این مشکل پیدا می کند.
The Head of the Inhuman Royal Family and King of Attilan, whose voice can cause destruction with the slightest whisper. Black Bolt went through the Terrigenesis process when he was 14. Showrunner Scott Buck said it was "a little bit difficult" to write for the character since he "does not speak, but yet he is our hero and the center of the show, so it does certainly present challenges in how you tell his story." Buck specifically ruled out the series using voice over, with Black Bolt instead seen communicating via sign language. Mount created his own sign system since the character is not from Earth and would not know Earth-based systems such as American Sign Language (ASL), and also studied orchestra conductors. Premiere director Roel Reiné told Mount to just use 15 or 16 signs, but Mount was intent on putting in the extra time to create an actual language, and borrowed the underlying rules of ASL but then "double-check[ed] my signs against ASL to make sure there is no overlap." This led to Mount creating a document for his language with over 50 pages to stay consistent. Sometimes the script would not include any specific lines for the character, and Mount would develop what he was signing himself. Mount felt that if he could develop the language over several seasons, it could become a full conlang equivalent to Klingon or Dothraki. Buck called Black Bolt enigmatic and fascinating because "a lot of times, we don't know what he's thinking."