莉瑟·赫克斯特（リセ・ヘクスト Lyse Hext），为解放祖国阿拉米格而热情洋溢的年轻斗士，她的格斗技艺出类拔萃，总是站在最前线战斗，性情上总是行动快于思考，但是为了能够成功解放阿拉米格，还需要她自身精神上的不断成长。
- Lyse was barely five years old when Ala Mhigo was taken over by Garlemald and her father, Curtis, one of the founding leaders of the Ala Mhigan Resistance, was killed. Lyse was spirited away by her older sister Yda to Sharlayan where the latter became a member of Louisoix Leveilleur's Circle of Knowing as an Archon. Six years before the Seventh Astral Era Yda died fighting in Ala Mhigo while on a mission to smuggle refugees out of their homeland. Lyse, at a time having no idea what she should do with her life, continued Yda's work by assuming her identity. Though she assumed Yda's partner Papalymo Totolymo would keep her secret after he magically branded her with the real Yda's tattoo, he told everyone to maintain her charade at her behest.
- Following the Scions being accused of the apparent regicide of Nanamo Ul Namo, Lyse and Papalymo escape and remain in hiding to investigate matters concerning the Ala Mhigan Resistance under the leadership of the mysterious masked man known as the Griffin. During the events of "Soul Surrender", while attending one of the rallies held by one of the Griffin's promixies, Lyse and Papalymo encounter the Warrior of Light and reunite with the Scions in dealing with the Warriors of Darkness. Outside Little Ala Mhigo, Gundobald greets Lyse, assuming she is Yda while claiming he and her father used to fight in the resistance.
- Arriving to the Rising Stones to discuss how leadership in the Scions will go, Lyse finds a friend of hers in the Ala Mhigan Resistance, M'naago, arriving with grievous wounds. As she is treated she warns the Scions that the Griffin is plotting to attack Baelsar's Wall. Lyse travels with Papalymo and Yugiri Mistwalker in secret tunnels to try to reason with the Griffin. Once the Griffin's true intentions and identity as Ilberd Feare are revealed, the Scions cannot stop him from sacrificing himself and his subordinates to summon an all-powerful primal with the Eyes of Nidhogg. Though Lyse protests Papalymo has Thancred Waters carry her back to Hilda's airship so the former can cast a spell to hold the forming primal at bay with his life ebbing. Sullen and grief-stricken, Lyse watches over the shell with Y'shtola and Yugiri at the East Shroud before joining the Warrior of Light's group to activate Omega to defeat the newly born Shinryu which breaks free as Papalymo dies.
- Lyse's tattoo fades to confirm Papalymo is gone and she unmasks as there is no more reason to continue posing as her sister. She explains her story to Alphinaud Leveilleur, Y'shtola Rhul and the Warrior of Light, how she and the real Yda came to Sharlayan following their father's death and that her reasons of assuming Yda's identity following her death. Y'shtola admits to having known Lyse's identity from the moment they met along with the other members of the Circle of Knowing but kept up the charade at the request of Papalymo, who agreed to aid Lyse though he had wanted her to follow her own path. Lyse takes those words to heart, deciding to fight for Ala Mhigo as herself.