Can't supply them all, so I'll explain the ones I can remember.
I have Jarvis, Ford, Jeff, Wire, and Austin. Don't need to remember Krieg or Gamma, and Chaos is softlocked currently.
SwappyLan25 has Lan.
Elyvir has Victor, Cyril, Ingrid, and Alexandria.
Ghostrix has Neo, Darian, Max, and Σ.
Esther has lots of characters, usually explaining the location of every character at once.
Dragonwolf73 has Streyll and Lukas. Resham doesn't interact with the main plot that much.
Chir' has Fate, Lorra, Rune, Ivyss, Chir' and Dijth. The rest don't do much with the main plot.
YharonΩ (Formerly FirescalesΩ) has The Vessel (which contains Anderson, Hornet, Jackson and Cinnamon), Flare, Alex, and a few others that I can't recall.
Wisp95 has Clot/Melody, Vile, Emil and Angel.
Champion Greninjoid has Madeline, and whatever the shiny Liepard is named. Lupa doesn't do much often.
That's all you need to know. Can't recall the others. Ocram isn't here much at all