You're the youngest armed detective in the agency, you're age and and ability is what makes you stand out. You're 12, your ability? 'necromancer' when you tell people about You're ability they seem to be freaked out.

Dazai was telling the agency jokes in the office, you didn't find any funny until he said:

Dazai: "If the black bird has black baby's, and the blue bird had blue baby's, what bird has no baby's? .. the swallow"

You, as a person, knew what this joke meant. Well not really, you thought of something dirty, although that's not what dazai meant. You were cackling a bit while all of the other members were confused and didn't get it