Soon after she began dating Charlie Kirk, Erika Frantzve -- a devout Catholic -- asked him: "Why don't you wear a cross?"

Kirk's response: "I'm not a jewelry guy." She gave him a St. Michael's Cross, which he started wearing as "he felt the weight of the world on him," Turning Point USA spokesman Andrew Kolvet told Fox News. "He never took it off again, until he was assassinated and the people caring for him ripped it off as they tried to save his life."

The St. Michael's prayer, written in 1898 by Pope Leo XIII, describes fierce warfare between good and evil: "St. Michael the Archangel, defend us in battle. Be our defense against the wickedness and snares of the Devil. … By the power of God, thrust into hell Satan, and all the evil spirits, who prowl about the world seeking the ruin of souls."

Erika Kirk wore that blood-stained pendant during the September 21 memorial service in State Farm Stadium in Glendale, Arizona -- with an estimated 100,000 people inside and thousands gathered nearby. At least 20 million watched on Fox, X and YouTube, with many more using other simulcasts.

In her 30-minute testimony, she said her husband knew his life was in danger, but he stressed the biblical message in a verse from Isaiah: "Here I am, Lord. Send me."

Kirk said she once told him: "Charlie, baby, please talk to me next time before you say that. … When you say, 'Here I am, Lord. Use me,' God will take you up on that.' … God accepted that total surrender from my husband and then called him to His side."

Erika Kirk's address dominated an event that featured President Donald Trump and multiple cabinet members. While praising what Kirk achieved in his 31-year life, several shared how his death has pushed them to ponder their own beliefs.