Her mother, Cara, told CNN daughter WFOR that Aiello was suffering from survival after one of the deadliest mass shootings in modern US history and was recently diagnosed with post-traumatic stress disorder.
Aiello, a student at Florida Atlantic University, died Sunday. Her funeral was in Davie, Florida on Friday.
Aiello had been on campus on the day of the mass attack, but not in the building where the shootings took place, her mother said, according to WFOR. Aiello, a high school cheerleader, graduated only a few months after a restless teenager shot down 14 students and three teachers.
Parkland School shooting victim Meadow Pollack's family described Aiello as "someone who loves Meadow."
The Marjory Stoneman Douglas High School sent an e-mail this week about mourning for Aiello's death, a teacher told CNN.
A former history teacher described Aiello as "nice and always smiling and talkative".
"I've always tried to say hello to everyone in the corridor," said the teacher.
4 February 2018 massacre was carried out by 19-year-old former Stoneman Douglas student Nikolas Cruz, who confessed to being the shooter, and was charged with murder in 17 cases.
In the weeks following the carnage, mourning students launched a nationwide movement calling for changes in public order that would prevent a similar tragedy.
Gun security advocates owe this effort to nationwide legislation, including 67 new gun laws passed by Republican and Democratic lawmakers in 26 states and Washington, DC According to an annual report from the Giffords Law Center on Preventing Armed Violence.