Born in Kinn-sala in the First Age, Ni'dhêl grew up forming a close bond with another Elf who was around the same age as her; Minyelaire Eru'Narleis. Both of them shared a mutual passion for the art of warfare, and by the time they were Sanyha (Came of Age), they had developed something of a friendly Rivalry that still persists in this age despite Minyelaírë's Exile.

Shortly after Minyelaírë was taken into the Vaydja caste Ni'dhêl was offered a position within the Ôtadharôr as a Lieutenant. She took handfuls of students with her and trained them with love, compassion, and discipline. These students would later survive the Brood war due to her excellent training.

After the Brood war, something had changed within Ni'dhêl. She seemed to have retreated into a very thick shell and barred herself within it. She became more distanced and colder. Her training was stricter, more disciplined, and harsher. She hid her compassion from newer students, as the warriors under her tutelage looked on with great wonder at what their teacher had become. During these years, she also developed a rather infamous intolerance of failure. She always expected the best of her students, and she only allowed the most dedicated, most persevering, and most disciplined Kinn-lai to train with her. She gained ranks and was known among her people as one of the most excellent teachers, with her students, right after the completion of their training, usually being stationed within Elite divisions of the Kinn-lai army. To be trained by her was a wish among many young Kinn-lai, and she is considered by many the perfect image of the Warrior's Caste; Courteous, Polite, Ingratiating.