Jaina Dara Fenix knew that she was nobody special, save for the fucking fact that she's the daughter of Anya Stroud and Marcus Fenix. And not to mention being conscripted to be the first known biotioc for the Cog, but that training won't be happening until she's pretty well into her late teens, at least 15 or 16.
Aside from that, she has been quite the tomboy as well, opting to being outside whenever possible. One day, her dad was planting a tree when she and her mother walked to where he was working.
She remained standing with her mother till her dad got finished digging the hole and placed the tree in it when Anya sent her on ahead, and she helped fill in the hole happily.
Her parents exchanged smiles while her father picked her up and settled her against his right shoulder. They watered the tree and went inside for some dinner and she took the time to get her hands clean. along with her father.
After that, her mother had gotten sick and she was sent to boarding school. After that, she was pretty pissed about it, but opted to let it go for her mother's sake.
Eventually, she reached the age of 15 when she was asked to undergo surgery for implants and she agreed to do it. After that, she received special training to become the first known N7 among the Cog.
Jania always went by the nickname JD because it was always better to use it informally. And because her middle name was Dara as well. Many knew that it was easier to use her nickname while she became the first ever biotic among the COG, but Jaina was also known as Subject Zero by the fuckers who screwed her fucking ass over when they made her ready to fucking fight.