Kuroyo Kage

Kuroyo Kage is one of the detectives working for the YPDA. However, unlike the other detectives, she is a mole in the YPD, and can only help them out with investigations in secret. She's the one who fetches them blackmail on clients, which are called "Black Reports".

Personality
Kuroyo is fully aware that her stalkerish inclinations and compulsion to jump in with a pick-up line even in professional contexts aren't normal or healthy. However, she's not really interested in addressing them.

Other than that, she is generally pretty sarcastic and quick to joke, much like the other detectives. But she's a bit less "in their bubble", and takes a more realistic, practical viewpoint than them most of the time.

Skills
Kuroyo can follow people without being noticed for very long stretches of time, and knows how to wiretap phones and hide cameras.

Broken Spiral
Kuroyo is the protagonist of Broken Spiral.