Solomon[]
Sytry first met Solomon in a library, after he had fallen from heaven. As Solomon gave him affection and a home in hell, Sytry appearently developed feelings for him. Sytry, along with many other demons, were deeply saddened when Solomon was killed.
William[]
At first, Sytry was only interested in William because he was the elector. However as time goes on, Sytry becomes protective of William, to the point of leaving a demon party to save him. Also, having found out that William is Solomon's desendent, Sytry has become even more protective of him as he does not want Dantalian to kill William like he did with Solomon.
Dantalion[]
Dantalion and Sitri have a very poor relationship, rooted from Sitri's hatred of Nephilims, and Dantalion's low regard of Sitri being a "puppet" to Baalberith. Their mutual dislike for each other became worse when Sitri found out, along with Camio, that Dantalion was Solomon's killer, engaging him in a fight as he declares that he will keep William safe away from him.
Camio[]
Neither seem that interested in each other,as they are not really seen interacting with each other.
Kevin Cecil[]
The two didn't interact before Dantalion vanished. However, after Sytry tried convincing William to pick him and Kevin threatened him, causing him to call Uriel a sadistic angel.
References[]