Presea's sister, Alicia Combatir, had left to work in Altamira, and their father, Sieg Combatir (ジーク・コンバティール Jiiku Konbatiiru?), had become too ill to continue work as a lumberjack. Presea wished to be strong enough to use her father's axe in his place, so she agreed to take part in an experiment which involved using herself as a host body in creating a Cruxis Crystal. The Exsphere increased her strength, but due to the nature of the experiment, it also halted her physical growth and suppressed her emotions. Under the influence of the Exsphere, Presea grew into a routine and did not notice when her father died. As a result, she did not bury him, instead leaving his corpse in his former bed.