Shiri

Shiri (シュリ, Shuri) (sometimes Romanized as Shirley) is a young Russian woman (Italian in the English dub) who walks around with a writing pad around her neck. If somebody is looking for something, they write what they're looking for on a page of the writing pad in the hopes that whoever found what they're looking for will read the pad.

Dollars/Mika Harima Arc
Shiri carries a 'Lost Stuff' sign around Ikebukuro, and it helps out Mikado, Walker, and Erika. She later attends the first Dollars meeting.

Yellow Scarves Arc
Shiri helps Anri run from the Yellow Scarves.

Dollars and the Blue Squares Arc
Shiri assists in taking Rio and her friends to safety.