She told CNN's Jake Tapper on Monday that she was still in shock. "I'm holding his picture, and I see his smile," she said. "He's so young and innocent. ... It's just too sad to even imagine."

"I've lost my only son. How can I sum up your life, your acts, in a few sentences?" Gilad Shaar's grieving father asked Monday at a memorial service, according to the Jerusalem Post.

His former counselor said that as a child, Shaar threw a birthday party for his school's goldfish, journalist Ben Hartman of the Jerusalem Post reported on Twitter.

Eyal Yifrach, beloved brother figure who sang on YouTube

At 19, Eyal Yifrach was the oldest of the victims and "a big personality," according to his friend and roommate. "Eyal is the type of person everybody would want as a brother," Micky Zivan told The Times of Israel.

Zivan said his pal would leave a jar of cookies near the study hall with a sign that read "Please take."

"We're crying, but these are tears of strength and love," said Uri Yifrach, Eyal's father, according to ynetnews.com. To the killers, he said, "You are wrongdoers, the nation of Israel promises that your day will come. We will not break. We are humanitarians, we have love and it will triumph. ... We're here, and you can't change that. We're a strong nation."

A few months ago, Eyal Yifrach sang at his cousin's wedding in a performance posted on YouTube, the Jewish Press reported.

"We miss him. It's hard not to see him around, his smile," Zivan said.