The need to temper the display of power granted by the Sons of God was a consideration for Albert, who found it inappropriate to flaunt such power arrogantly. This restraint was not only to keep the connection with the Erlkönig and the existence of the Devil hidden but also out of a sense of humility and respect for others, particularly Gullianot Maxwell. In this regard, Albert consciously suppressed his magical power to ensure he did not overshadow Gullianot with abilities that were not inherently his own.
Similarly, Sena, in the presence of Gullianot, meticulously concealed his Devil powers, presenting himself as the official Hero, thus engaging with Gullianot on equal human terms. Even without using magical power, Sena's abilities were exceptional enough to be worthy of admiration and envy, showcasing a level of skill and strength far beyond that of ordinary humans. In fact, even Albert, when restricted from using magical power, would find himself easily outmatched by Sena.