Daniel Schwartz is Levi's Uncle Saul's boyfriend.
When Daniel heard that his boyfriend, Saul, was sick, he came to the nursing home only to find that Saul had already died. He then introduced himself to Levi and Nico, who didn't know that Saul was gay and knew that Levi was also gay. They talked and shared stories about Saul and then Daniel taught Levi how to prepare Saul's body.
He was in a long-term relationship with Saul before Saul's death. When Saul died, he came to the nursing home and helped Saul's nephew Levi prepare his body according to Jewish tradition.
His family was very accepting of him being gay.