Witnesses

This list does not include characters from the manga, anime, or Phoenix Wright v. Professor Layton.

Main Games
From the six main games (Phoenix Wright, Justice for All, Trials & Tribulations, Apollo Justice, Dual Destinies, and Spirit of Justice).
 * Acro
 * Pees'lubn Andistan'dhin
 * Adrian Andrews
 * Candice Arme
 * Datz Are'bal
 * Jean Armstrong
 * Paul Atishon
 * Luke Atmey
 * Bellboy
 * Bikini
 * Aura Blackquill
 * Simon Blackquill
 * Spark Brushel
 * Sasha Buckler
 * Larry Butz
 * Armie Buff
 * Yuri Cosmos
 * Herman Crab
 * Daryan Crescend
 * Athena Cykes
 * Betty de Famme
 * Bonny de Famme
 * Shelly de Killer
 * Ron DeLite
 * Norma DePlume
 * Miles Edgeworth
 * Terry Fawles
 * Maya Fey
 * Morgan Fey
 * Pearl Fey
 * Phineas Filch
 * Damon Gant
 * Kristoph Gavin
 * Valant Gramarye
 * Dick Gumshoe
 * Cody Hackins
 * Lotta Hart
 * Dahlia Hawthorne
 * Valerie Hawthorne
 * Tahrust Inmee
 * Apollo Justice
 * Amara Sigatar Khura'in
 * Rayfa Padma Khura'in
 * Wocky Kitaki
 * Victor Kudo
 * Florent L'Belle
 * Lamiroir
 * Sal Manella
 * Jake Marshall
 * April May
 * Aristotle Means
 * Mike Meekins
 * Mimi Miney
 * Drew Misham
 * Vera Misham
 * Moe
 * Robin Newman
 * Pierce Nichody
 * Hugh O'Conner
 * Wendy Oldbag
 * Olga Orly
 * Phantom
 * Polly
 * Ponco
 * Will Powers
 * Roger Retinz
 * Marlon Rimes
 * Dhurke Sahdmadhi
 * Nahyuta Sahdmadhi
 * Frank Sahwit
 * Myriam Scuttlebutt
 * Orla Shipley
 * Ema Skye
 * Lana Skye
 * Sorin Sprocket
 * Solomon Starbuck
 * Angel Starr
 * Wesley Stickler
 * Damian Tenma
 * Jinxie Tenma
 * Alita Tiala
 * Furio Tigre
 * Machi Tobaye
 * Ted Tonate
 * Geiru Toneido
 * Uendo Toneido
 * Ahlbi Ur'gaid
 * Dee Vasquez
 * Richard Wellington
 * Redd White
 * Benjamin Woodman
 * Juniper Woods
 * Phoenix Wright
 * Trucy Wright
 * Yanni Yogi

Investigations

 * Quercus Alba
 * Lance Amano
 * Justine Courtney
 * Sebastian Debeste
 * Sirhan Dogen
 * Jay Elbird
 * Dane Gustavia
 * Katherine Hall
 * Karin Jenson
 * Horace Knightley
 * Zinc Lablanc
 * John Marsh
 * Cammy Meele
 * Lauren Paups
 * Jacques Portsman
 * Delicia Scones
 * Shih-na
 * Nicole Swift
 * Rhoda Teneiro
 * Bonnie Young

Great Ace Attorney

 * Quinby Altamont
 * Patrolman Roly Beate
 * Patricia Beate
 * Beppo
 * Jezaille Brett
 * Barry Caidin
 * Peppino de Rossi
 * Fabien de Rousseau
 * Enoch Drebber
 * Bruce Fairplay
 * Lay D. Furst
 * Maria Gorey
 * Gotts
 * Ashley Graydon
 * Olive Green
 * Satoru Hosonaga
 * Seishiro Jigoku
 * Kyurio Korekuta
 * Gina Lestrade
 * Balthazar Lune
 * Magnus McGilded
 * Rei Membami
 * Raiten Menimemo
 * Adron B. Metermann
 * Yujin Mikotoba
 * Soseki Natsume
 * Iyesa Nosa
 * Nikolina Pavlova
 * William Shamspeare
 * Courtney Sithe
 * Nash Skulkin
 * Ringo Skulkin
 * Bif Strogenov
 * Tchikin Strogenov
 * Esmeralda Tusspells
 * Barok van Zieks
 * Venus
 * Daley Vigil