Isaac has a relatively calm demeanor from the start, which is consistent with other earth-elemental Adepts seen throughout the series. Like them, he is seen as bearing leadership qualities, which naturally incline others in the group of Adepts he assembles to defer to his judgment. However, his past as well as his failing actions in the first game also leaves him with some low self-esteem that only made him more hot-headed by the second game, being especially cold and aggressive with those with questionable ideals. Despite this, he maintains trust in those he cares for like his childhood friend Jenna, even after she apparently throws her lot in with Isaac's former enemy Felix, who was complicit in letting her be taken hostage, but when that enemy later saves Isaac's life despite continuing the aims Isaac seeks to defeat, Isaac shows a willingness to trust his enemy's judgment and motivations. Even at his lowest points, he always maintains a heart of gold, and a dedication to responsibility and honor.