Jessa is striking in a lively, unvarnished way, with an easy grin that can turn into a watchful, measuring look in an instant. She stands with her weight slightly forward, as if ready to move, and tends to watch a room without making a show of it. Her breathing stays loose and quiet when relaxed, but becomes deliberately slow when danger rattles her.

Witty, coolheaded, passionate, and easygoing. Jessa is sharp and logical despite her dislike of bookish study. She speaks her mind when she can do so without needlessly endangering someone else, and is more dependable than her playful manner first suggests. She enjoys friendly competition and a good fight, but never starts one to prove herself.

An orphan raised in Toran, Jessa learned early that quick wit and a steady nerve could be as useful as a hard fist. During one summer, she and fellow orphan Odren Eoltdeor stood up for the isolated Alenna Resalia when highborn bullies tormented her. The three became inseparable. Alenna's father later took Jessa and Odren into House Resalia, where Jessa found education, opportunity, and, for the first time, a place where she could be carefree without mistaking softness for weakness. She excelled at riding, fencing, and unarmed sparring, and enjoyed beating Odren almost as much as teasing him for losing. At seventeen, Jessa accompanied Alenna toward Dessi, then, at Alenna's father's arrangement, joined the Tolchoi people near the Vassagonian desert. After difficult trials, she was accepted into their matriarchal community. She trained with the blade and throwing knives, learned their harsh folk magic, and earned respect as a capable leader. A letter from Alenna told her of her benefactor's death and set a meeting for five years later. When they reunited, Alenna explained that House Resalia had been stripped of its holdings save for Hengecarn. Jessa chose to stand beside her. Back in Toran, she and Alenna reunited with Odren, and the three renewed their childhood vow to protect one another. After an ambush on the road to Hengecarn convinced them that Alenna was being targeted, Jessa and Odren agreed that one of them should always remain close to her.