Seeing as the forum covers all Tales of games, the cast is limitless.
Here's a list of possible names though if you don,t know who to take, bold ones are taken by at least one person, just so you know incase you wanted to be someone different from others. Names changes from japan to english versions, so don't be surprised by possible differences. I possibly can't list everyone, so I'll stick to the important cast(and what I know)
Tales of Phantasia
-Cless/Cress Alvein
-Mint Adnade
-Arche Klaine
-Klarth/Claus F. Lester
-Chester Barklight
-Suzu Fujibayashi
-Dhaos
Narikiri Dungeon
-Mel
-Dio
-Kruelle
Tales of Destiny
-Stan/Stahn Aileron
-Rutee Cartret/Katrea
-Woodrow/Garr Kelvin
-Philia Philice/Filia Felice
-Chelsea Tone/Torn
-Mary Agent/Argent
-Leon/Lion Magnus
-Johnny Shiden/Karyl Sheeden
-Mighty Kongman/Bruiser Khang
-Lilith/Lilis Aileron
Tales of Eternia/Destiny II
-Rid/Reid Hershel
-Farah Oersted
-Meredy (and Quickie)
-Keel/Keele Zeibel
-Chat
-Rassius Fomalhaut
-Fog/Max
Tales of Destiny 2
-Kyle Dunamis
-Reala
-Loni Dunamis
-Judas
-Harold Belserius
-Nanaly Fletch
-Barbatos
Tales of Symphonia
-Lloyd Irving
-Collet/Colette Brunel
-Genius/Genis Sage
-Refill/Raine Sage
-Kratos Aurion
-Shihna/Sheena Fujibayashi(and Corrine)
-Zelos Wilder
-Presea Combatir
-Regal Bryan/Bryant
-Mithos Yggdrasil
-Martel
-Yuan
-Abyssion
-Seles
-Tabatha
Knight of Ratatosk
-Emil Castagnier
-Marta Lualdi
-Richter Abend
-Tenebrae
-Aqua
-Alice
-Decus
Tales of Rebirth
-Veigue Lungberg
-Mao
-Eugene Gallardo
-Annie Barrs
-Tytree Crowe
-Hilda Rhambling
-Agarte Lindblum
-Milhaust Selkirk
Tales of Legendia
-Senel Coolidge
-Shirley Fennes
-Will Raynerd/Raynard
-Chloe Valens
-Norma Biatty/Beatty
-Moses Sandor
-Jay
-Grune
-Stella
-Walter
Tales of Abyss
-Luke fone Fabre
-Tear Grants
-Jade Curtiss
-Anise Tatlin
-Guy Cecil
-Natalia Luzu Kimuelasca Lanvaldear
-Asch the Bloody
-Legretta/Regret the Quick
-Sync the Tempest
-Largo the Black Lion
-Dist the Reaper/Runny/Rose
-Arietta the Wild
-Fon Master Ion
-Professor Gelda Nebillim
-Van Grants
-Mieu
Tales of the Tempest
-Caius Qualls
-Rubia Natwick
-Tilkis Barone
-Forest Ledoyen
-Arria Ekberg
-Lukius Bridges
-Albert Mueller
-Rommy
Tales of the World
Naririkiri Dungeon 2 and 3
-Frio Sven
-Kyaro Olange
-Tanatos
-Ponee
-Krait
Summoner's Lineage
-Fulein K. Lester
-Macaron
-Velga Montor
-Volga Montor
-Xex
Radiant Mythology
-Kanonno
-Yourself
-Ganzer
-Aurora
-Widdershin
Tales of Innocence
-Ruca Milda
-Iria Animi
-Ricardo Soldato
-Spada Belforma
-Ange Serena
-Hermana Larmo
-Martius
-Gardel
-Hasta Extermi
-Osbard Fan Cluera
-Chitose Charma
-Sean Denebro
-Arber Gradiosa
Tales of Vesperia
-Yuri Lowell
-Estelle
-Flynn Scifo
-Rita
-Repede
-Karol Capel
-Raven
-Judith
More to come