Aeian T'Goni

Aeian T'Goni (highlighted simply as "PTSD Soldier") is an Asari Huntress being treated for PTSD at Huerta Memorial Hospital in Mass Effect 3.

Mass Effect 3
Aeian is found in the entrance hall of Huerta Memorial Hospital, relating the story of her last assignment on Tiptree to an Asari psychotherapist. At the start of the dialogue, it is revealed that she refuses to take showers and demands a permission to carry a firearm and a transfer to a facility without humans. As her story progresses, her oddities are slowly explained by a massive survivor guilt complex she suffered as a result of her mission.

Aeian landed on Tiptree with a group of other Asari Commandos, including her long-time crush Neiara, to assist the local human colonies evacuating from the Reaper invasion. While taking respite at a human farm, Aeian took off her gear to take a shower, and that's when the farm was attacked by Neiara, who was turned into a Banshee, and scores of husks. While Neiara slaughtered the farmers, unarmed Aeian escaped to the hills with a human girl named Hilary, whom she befriended earlier. Her commander decided the farm war overrun and never sent a shuttle back.

After two days, Aeian realized that their only chance was to retrieve the radio station she left at the farm and signal for help. She and Hilary sneaked back in to find a number of farmers still alive. Unaware of indoctrination, Hilary freed them, only for them to raise alarm and start attacking. Aeian used biotics to carve a path to escape again but Hilary broke her leg and was unable to stay quiet, let alone run. At risk of being discovered by Neiara, Aeian killed Hilary, surviving to escape with valuable data that earned her a medal.

Afterwards, Aeian blames herself for the deaths of the farmers: if she hadn't lowered her guard, Neiara wouldn't have caught her unaware and unarmed. Neiara, she says, was controlled by the Reapers, while she was only driven by her own base needs. She also feels intense guilt about experiencing adrenaline rush as she killed the indoctrinated humans. After telling her story, Aeian asks for a gun again.

At the Spectre Terminal, Shepard can use Spectre authority to override security measures and entitle Aeian to carry a firearm.

Trivia

 * Aeian's name is revealed only in a message on the Spectre Terminal on Citadel.
 * Aeian relates her story in small heaps, continuing only after Shepard speaks with another character or leaves and reenters the location via elevator.