Characters in Y is for yesterday

Kinsey Millhone

Also in A is for Alibi, B is for Burglar, C is for Corpse, D is for Deadbeat, "E" is for Evidence, "F" is for fugitive, "G" is for Gumshoe, H is for Homicide, I is for Innocent, K Is for Killer

Fritz McCabe

Robert Dietz

Also in "G" is for Gumshoe, H is for Homicide, I is for Innocent, "N" is for Noose, P is for Peril, R is for Ricochet, W is for wasted, X

Lonnie Kingman

Also in "E" is for Evidence, I is for Innocent, K Is for Killer, "L" is for lawless, "M" is for Malice, "N" is for Noose, "O" is for outlaw, P is for Peril, Q Is for Quarry, T is for Trespass

Diana Alvarez

Also in U is for Undertow, "V" is for vengeance

Jonah Robb

Also in B is for Burglar, C is for Corpse, D is for Deadbeat, "E" is for Evidence, "G" is for Gumshoe, I is for Innocent, J Is for Judgment, K Is for Killer, "L" is for lawless, "M" is for Malice

Moza Lowenstein

Also in C is for Corpse, T is for Trespass, W is for wasted

Vera Hess

Also in Q Is for Quarry, X

Aunt Gin

Also in H is for Homicide, J Is for Judgment, "L" is for lawless, "M" is for Malice, "N" is for Noose, "O" is for outlaw, P is for Peril, Q Is for Quarry, R is for Ricochet, S Is for Silence

Mr. Lucas

Iris Lehmann

Poppy Earl

Lauren McCabe

Austin Brown

Sloan Stevens

Troy Rademaker

Rosie (A is for Alibi)

Also in A is for Alibi, B is for Burglar, C is for Corpse, D is for Deadbeat, "G" is for Gumshoe, I is for Innocent, J Is for Judgment, "L" is for lawless, "M" is for Malice, "N" is for Noose

Pete Wolinsky and Ruth

Also in X

Anna Dace

Also in X

Bayard Montgomery

Elmore Leonard (Goodreads)

Also in "L" is for lawless, "O" is for outlaw

Pearl White (Y is for Yesterday)

Cory Stevens

Margaret Seay

Roland Berg and Steve Ringer

Rebecca Dace and Quillen Millhone

Also in X

Lucky (Y is for Yesterday)

Ivan Pavlov (Goodreads)

Tigg Montgomery

Bradley Benoit

Phyllis Lowe

Celeste Lowe

Hazel Rose

Detective Burgess