Durarara!!x2 Shou Episode 06

"A Crow in the Dark Night" is the sixth episode of Durarara!!x2 Shou and the thirty-third episode overall of the Durarara!! anime.

Synopsis
Celty is suddenly under attack. What in the world could her attacker be after? Unaware of what’s happened to Celty, Shinra Kishitani waits for her at home, only to have Shizuo show up with a young girl in tow. Who is this girl, who has expressed her murderous intent to Shizuo? Meanwhile, Mikado is spending the long weekend mulling over his best friend’s warning. Hearing a nasty rumor about the Dollars, he starts digging around to find out the truth.

Adapted From
adapted from what manga or LN chapter?

Referbacks
references to previous episodes?

New Characters
In order of appearance (not including OP)