Izaak is Nathan's love. They might fairly recently but their feelings grew exponentially. When we see them now in the story, Izaak has just died and is in a limbo-type space. He is observing Nathan and cannot interact with him truly. He longs to be with him but can't.

Izaak is pretty cautious. He's smart and calculates things. However, when it comes to Nathan, he's pretty bold and is put out of his normal strategic behavior.

This character is an important one. He will be expected to have full dialogue for emotion-heavy scenes.