Elisha was the actual successor to the throne of Elfrieden Kingdom, being the last surviving member of the Elfrieden Royal through the Succession Crisis after the death of the 12th King of Elfrieden. She eventually marries "Albert" giving him her family name with it and the role of 13th King of Elfrieden.

In her youth, Elisha was tomboyish for a princess, often taking risks and acting unlike a princess. At the time, she was certain that given her station she was never a actual contender for the throne of Elfrieden. After the first instance of her magic sending memories back to her, she became much more reserved and pragmatic, acting more like a princess despite her desires as she wished to remain alive more. During the events of the succession crisis, she routinely received memories from future-selves and would mentally spiral into a depressive state. It was not until she decided to chose Albert that she began to have hope for the value of her own life again. She was resistant to succeeding the throne, and would force it upon her husband. She remained a devoted supporter through Albert's reign and was a motivating factor behind Kazuya's ascension to the throne. While she is still generally reserved and quiet, she is a doting grandmother to Cian and Kazuha.

(Source: How a Realist Hero Rebuilt the Kingdom Wiki)