For all of Laphicet's qualities as a traditional hero, the rest of the party exhibits varying shades of gray morality. Due to his creed of exercising one's will, Eizen is one of the more casual advocates of this morality, even concerning matters where his personal opinion differs from that of the others. In this way, he exhibits a brutal sense of fairness that borders on, if not breaches, the territory of coldness.
Life as a pirate demands that one's morals be flexible at best or inky black at worst. For Eizen, his philosophy centers on the sanctity of choice: If it's out of one's own will, one can do whatever one wants, and he'll respect that. Nonetheless, this doesn't mean he's above calling out someone on their foolishness before consequences arise, as he does often with Velvet and Zaveid—Theodora's obstinate lover who butts heads with Eizen on the subject of her fate.
When a malak becomes a dragon, all sense of self deteriorates, and the dragon is a shadow of its former self. The more Zaveid refuses to allow harm to the white-horned dragon, the more he earns Eizen's ire. In a circumstance like this, Eizen believes that euthanizing the dragon is the only means of salvation left, and Laphicet struggles to understand how death can save someone—a method that Eizen employs at least twice within Berseria.
During a clash of wills, Eizen pays his respects by matching the drive of his adversary, and even encourages the other party to give more. On the other hand, the absence of choice in another's position incurs his wrath, often spurring him into an impulsive lunge. After the party engages a failed malakhim experiment that had been discarded by the Abbey, Eizen expresses his fury in how the involved malakhim had been robbed of their will; had they agreed on participating of their own volition, he wouldn't have cared, no matter how grisly the end product had been.