A Ranker's breakthrough was an intensely personal affair, an unveiling of their unique Individuality when reaching new heights of power.
The other Rankers understood the significance of such a moment and didn't question Eren's decision to have his privacy during this crucial event. With brief verbal wishes and knowing nods, they dispersed from the scene, leaving Eren with the protection of his trusted companions.
Renita, Altashia, and the members of the White Raven Guild stayed within the vicinity, forming a protective perimeter around their comrade. They also maintained a safe distance from Eren just for him to have his privacy and go through with his breakthrough.
Eren knew that he would be most vulnerable during the shattering of his current mana core, making way for the formation of the B-Rank mana core inside him. This battlefield was no place for indiscretion, as enemy kingdoms could exploit his vulnerable state if they caught wind of his breakthrough.