Another photo on Gee's Instagram page shows her earlier in the week, on duty with her rifle next to a line of people waiting to board a transport plane. She describedher assignment as "escorting evacuees onto the bird.”

Other recent Instagram photos show Gee with friends in Spain, where they shared a toast, and Greece. Other pictures show the Marine riding a camel in Saudi Arabia andreceiving her promotion to sergeant.

"Never would have imagined having my Sergeant promotion meritoriously in Kuwait," she wrote of the promotion in a post shared three weeks ago.

AFacebook postby the city of Roseville, California, which calls Gee "a hometown hero," says she graduated in 2016 from the city's Oakmont High School and enlisted in the Marines a year later. It says her husband, Jarod Gee, also is an Oakmont graduate and a Marine.

Geewas remembered bySgt. Mallory Harrison, a fellow Marine who roomed with her for more than three years, in aFacebookpost accompanied by more than a dozen photos.

"Her car is parked in our lot.It’s so mundane. Simple. But it’s there," she beganthe post. "My very best friend, my person, my sister forever. My other half. We were boots together, Corporals together, & then Sergeants together. Roommates for over 3 years now, from the barracks at MOS school to our house here. We’ve been attached at the hip from the beginning.

"I can’t quite describe the feeling I get when I force myself to come back to reality & think about how I’m never going to see her again. How her last breath was taken doing what she loved — helping people — at HKIA in Afghanistan. Then there was an explosion. And just like that, she’s gone."

She said the war stories told by older Iraq and Afghanistan veterans are "not so distant anymore."

Harrisonconcluded: "My best friend. 23 years old. Gone. I find peace knowing that she left this world doing what she loved. She was a Marine’s Marine. She cared about people. She loved fiercely. She was a light in this dark world. She was my person.…Til Valhalla, Sergeant Nicole Gee. I can’t wait to see you & your Momma up there. I love you forever & ever."