Nowadays, she would feel tired when she uses her energies.
The pressure of the world weakens themes when they uses their energies.
In the past, eating and drinking for Disk Formation levelers is more about feeling.
Azief himself did not eat or drink when he reaches Disk Formation leveler but he eats and drinks just because it is like a habit.
Eating itself has some flavours.
So eating is no longer a need but a want.
And eating itself has evolved in this new world with many cuisine that have properties to it that make people "want" to eat.
The same case for drinking. Azief drinks coffee.
He is not thirsty nor he needed to drink. But for Azief when it is about eating and drinking, he simply does it so that he did not forget that he was human.
This feeling of losing oneself is hardly understood by Sofia. Only after she reached the same level, she understood how terrifying it is to lose….yourself