Laura

“She can't hurt him, Izzy," (Alec)
"I know you're worried, but he's got the Mark of Cain; he's untouchable. Even a Greater Demon can't harm him. No one can." (Alec)

Isabelle scowled at her brother. "So what do you think she wants him for, then? So she'll have someone to pick up her dry cleaning during the day? Really, Alec--”
― Cassandra Clare, City of Fallen Angels

“You dated a vampire? A girl vampire?" (Simon)
"It was a hundred and thirty years ago," (Magnus)
"I haven't seen her since." (Magnus)
"Why didn't you tell me?" (Alec)
"Alexander, I've been alive for hundred of years. I've been with men, been with women -- with faeries and warlocks and vampires, and even a djinn or two." (Magnus) He looked sideways at Maryse, who looked mildly horrified.
"Too much information?" (Magnus)”
― Cassandra Clare, City of Fallen Angels

“Hold on to me," Alec said, and Magnus gave him the sort of smile that made Alec feel like someone had taken an apple corer to his heart and tried to dig out the center.

"I always do, Alexander," he said. "I always do.”
― Cassandra Clare, City of Heavenly Fire

“So I’m your first ever Shadowhunter, huh?" Alec said when they separated at last.
"You’re my first so many things, Alec Lightwood,”
― Cassandra Clare, City of Heavenly Fire