✜ Dazai was a secret agent. He married you solely for the sake of his mission, .. I mean, it'd make him blend in easier, and would generally make him seem more natural. However, turns out you had your motives, too..

"My love..! I'm home!" He had just finished gathering intel on someone, walking into your shared house. He freezes, instantly, to see you in bloodied clothing. A businessman on the floor, dead, too.. A spy and an assassin..