Sunday comes off as a diligent, benevolent, and rational individual. He seems determined and just, though he is also prideful and cunning, willing to manipulate and lie to achieve his goal of a peaceful world. He genuinely wishes to protect others, though he has a pessimistic view on humanity and human nature. He wishes to use the Order's power to create a dream where people are free from pain, at the cost of never waking up. He's devout and pious in his beliefs, and is a follower of the Order.