Lucas is one of the students of Madeleine Skurski who came to visit her in the hospital.
He is in Ms. Skurski's math and science class. When Ms. Skurski became ill, Emma, Lucas, and Adam skipped their after-school study session to see her. They then returned with the rest of their class, which is when Ms. Skurski broke the news that she wouldn't be returning to school.
He loves his teacher, Ms. Skurski. When Ms. Skurski got sick and Mr. Arnold replaced her, he came to the hospital to see Ms. Skurski.