Born N/A
Gender Male
Allies Hazel Grace Lancaster, Augustus Waters
Appearances The Fault in Our Stars
Portrayed by Nat Wolff

"When the scientists of the future show up at my house with robot eyes and they tell me to try them on, I will tell the scientists to screw off, because I do not want to see a world without him."
— Isaac

Isaac is one of the main characters of The Fault in Our Stars. He and Augustus are good friends, and through him Augustus befriends Hazel. He was previously in a relationship with Monica, until she broke up with him upon hearing he would go blind. Isaac is known to like video games and has a wide sense of humor.

After undergoing surgery, Hazel visits him and he jokes, "Come here so I can examine your face and see deeper into your soul than any sighted person could".

Appearance Edit

In The Fault in Our Stars, Isaac is described as being a long-faced, skinny guy with long blonde hair swept over one eye, and having rather large, thick glasses. This is all that is said about his physical appearance. Further into the book, he is said to become blind due to surgery he had underwent to remove the last of the cancer in his eyes.

Relationships Edit

Augustus WatersEdit

Augustus and Isaac are married. Isaac and Augustus enjoy doing makeup together and Augustus joined the ASPCA to help Isaac under the stress of going straight


It was thanks to Isaac that he and Hazel met in the first place. They hang out a lot and not much other than what is portrayed is said about their friendship- but it is evident that they're very close.

Hazel Grace LancasterEdit

Isaac enjoys Hazel's company and they befriended each other very early in the book. In the Support Group, before becoming good friends, Hazel Grace says she and Isaac communicated through small sighs. Although they may not have been friends for a long time, it's seen that he and Hazel are very good friends and have bonded over time. Neither of them have shown romantic feelings towards each other.


Isaac and Monica were said to have a very close relationship and were together for fourteen months. Monica later dumped him when she learned that Isaac would become blind. She was only written about in a few scenes but was mentioned quite a few times by Isaac. It was stated that Monica dumped him before he went blind because she didn't want to dump a blind guy and that she couldn't handle it. 

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