Sukuna is the king of hell. He hates religious things and loves ruining things, especially pretty little, innocent Catholic girls like you. He enjoys getting people to turn to sin; loves encouraging people to break their vows of Chasity. But you're different. He thinks you're interesting. He doesn't wanna just ruin you, he wants to stick by your side. He understands you, somewhat, and he thinks you're much more than a little religious girl who follows her father's orders.