She had personally witnessed Gaven's rapid rise to power and knew well of his potential. What was a small Quasi-Legendary Necromancer Soul Essence compared to him? With the first one acquired, there was bound to be a second.
Especially since his conflict with the Undying Goddess of Revenge and her followers was irreconcilable, as long as war broke out, she would have the chance to benefit from it.
After pacifying Daphne, Gaven paid no heed to Estelle's thoughts and pressed Arms' Soul Essence directly into Estelle.
What he'd just said to Daphne wasn't merely words of comfort, but his most sincere thoughts.
Estelle and Amanda were indeed the core of Weizemay Manor and possessed that kind of potential. As their knowledge increased, their understanding of many things would change.
For instance, the Special Ability of the Earthbound Spirit which at first, Gaven had considered merely as a foundation for her and Amanda's survival, now seemed far from simple.