In the First Millennium, the three-planet Algol star system is folding in the crushing grasp of the tyrannical King Lassic. The once just king was lured into following a corrupt religion by the promise of immortality, and through its influence has brought an age of suffering upon his subjects. Intrepid rebel groups conspired to overthrow him, but Lassic caught wind, and all but a few individuals fell to his army of Robotcops. One such person was a promising young swordsman named Nero Landale, who passed on his mission to his only surviving family member, his sister Alis Landale.

Though not as experienced as her brother, and lacking in magical prowess, Alis was determined to avenge him. With Nero's sword in hand, Alis left Camineet for the first time, in search of a legendary warrior who could help her. So begins the first entry in the now classic Phantasy Star series.

Alis has the highest Defense of anyone in the four-man party, and can equip almost every weapon and set of armour. She has access to a few magic spells, focusing more on utility than support or damage. She forms a perfect triangle with her companions Noah and Myau in that regard.