Barely known outside conservative youth circles before her 31-year-old husband, Charlie Kirk, was murdered at a campus event 10 months ago, Erika Kirk was thrust into a crucible.

A former Miss Arizona born Erika Frantzve, she was a New York-based entrepreneur selling Christian-themed clothing when she met Mr. Kirk in 2018. After the two married in 2021, she became a featured speaker at Turning Point USA events and an occasional guest on his podcast.

Mrs. Kirk, 37, assumed her husband’s mantle as the chief executive of Turning Point USA less than a week after his assassination. He had built the conservative youth organization from scratch starting in 2012 into a juggernaut with $96 million in annual revenues.

She is presiding over an organization that faces a host of challenges: donors skeptical of Turning Point’s viability, staff members still rattled after Mr. Kirk’s murder, and an election cycle that is already seeing young voters flee the Republican Party in droves.

These days, Mrs. Kirk seldom leaves her gated residence in Scottsdale, Ariz., to protect herself from stalkers, paparazzi and threats. But on Monday she attended the start of a hearing to determine whether the evidence against Tyler Robinson, the man accused of assassinating her husband, is sufficient to proceed to trial.

The hearing puts Mrs. Kirk in the same room as Mr. Robinson, roughly 10 months after she tearfully proclaimed, “I forgive him,” at her husband’s memorial service inside a football stadium in Phoenix. She will likely see the videotape of a bullet piercing Mr. Kirk’s neck. Her reaction to all this will be picked apart by those who doubt her grief.

That’s because, as she tried to fill Mr. Kirk’s singular role, suspicious — and often baseless — questions about her swirled in online conservative media primed to see conspiracies.

Was her mourning genuine or was she enjoying the spotlight a little too much? Was her wholesome, Biblically inspired “trad-wife” persona authentic? Or was she at heart a careerist cashing in on her husband’s death? And speaking of Mr. Kirk’s murder: What did she know and when?