Athrielle is a former hero from Jarsali's Company and mercenary from pre-empire Caupona. She now spends her time as a mercenary for people she already worked for, and occasionally display her strength in wrestling matches.

Athrielle was born in southern Caupona, before the foundation of the Cauponian Empire, among the Inail Clan. She was trained as a spear fighter and became part of their elite fighters in her teenage years. As such she took part in many raids and massacres perpetuated by her clan. In her early adulthood she became one of the most ferocious soldiers of the clan, known for her ruthlessness and lack of mercy. For that she was revered among her people, and many celebrations were held in her horde's honor. After one particularly bloody raid, the group led by Athrielle turned against the clan's chieftains and an internal conflicted ignited. A great portion of the Inailurians died in the couple of days of fighting. The remaining people scattered across Caupona, and the rest continent. This event left room for the Cauponian Empire to emerge and conquer the lands left innocupied. Athrielle survived although not unscathed.

After the events that lead to her people demise, Athrielle found herself aimless, held down by her bloody past she wandered the continent of Mijin for a few decades. Living mostly of hunting and occasionally picking up monster killing contracts. She slowly formed the wish to atone for her mistakes and decided to live on the roads as a mercenary, living anywhere else than the Inail lands. She joined a few adventuring parties over the years, but never stayed long enough to build bonds with anyone.

After decades living her life as a mercenary, wandering the Mijin continent and failing to properly become part of a party, she met with group of adventurers in Gostion. Among them was Pietro Adélaïde di Caspiani, an ageing and weak looking human. Caspiani took on the role of the party's offensive magic user, and the two of them quickly formed an impressive duo. His power completing her physical prowess and fighting skills beautifully. Together they shined brighter than the rest of the group and quickly became renowned as monster slayers through the country. Many nobles of Gostion's Queendom were seeking to use their strength as an asset in petty rivalries and schemings. But as Athrielle remained consumed by the acts of the Inailurian people she took part in, she unwaveringly refused those contracts.

Around the year 1064, Athrielle was living in Panje. There she met people from the Wrestling Theater, a place holding theatric fights as well as free for all matches. She applied and started partaking in matches there, quickly becoming known as the Terrible Elf. She preferred taking part in theatrical matches rather than real fights, as most of the people partaking were too weak for her. She met with young mountain dwarf woman named Vistra Aranore, whom displayed great strength. Vistra was often called a cheater because of the disparity between her size and her strength, people though her ability to lift someone as huge as Athrielle was bound to use a potion. Caspiani gave her the idea to actually drink a Potion of Growth and reach a size where her strength would not seem strange. Therefore the decades long rivalry between "The Terrible Elf Athrielle" and "Vistra The Mountain Giant" was born. They often switched roles over the years, but Athrielle most often played the heel of the match, giving Ararone shining victories.