Undocumented Features has a very large number of characters and organizations. Most are listed here with some having descriptions.
Not necessarily hero's, but definitely not villains.
- Gryphon (aka Benjamin D. Hutchins) - The one who started it all by creating Kei and Yuri by using the Cluless compiler and the HoloDECstation. Designer of many starships as well as New Avalon, former Admiral of the WDF, CinC and brains behind the IPO, defacto Chief-of-State of the Republic of Zeta Cygni, and wife to Kei Morgan and father of Kaitlyn and Leonard Hutchins, Priss and Gai(Guy) Morgan, and Corwin Ravenhair.
- Kei Morgan
- Yuri Daniels
- Utena Tenjou
- Corwin Ravenhair
Most definitely villains.
- Largo - The biggest source of trouble for the WDF is the GENOM corporation and its CEO/President/Owner Largo. At least until they killed him in the Battle of Zeta Cygni.
- Akio Ohtori
- Surtur - The demon lord of fire, Surtur is like the devil in Norse Mythology. It is rumored that he is pulling the strings behind all the evil that is happening in the UF universe after the Twilight story.
On the side of Good
- Lord Wolfgang Amadeus Fahrvergnugen - Creator of the Wedge Defense Force and Duke of Planitia. Seen often in the 2nd and 3rd core stories but only sparingly afterwards.
- Arsial - Queen of Salusia, joined the WDF in the 3rd core story as a part of the Salusian 101st FTL Calvary.
- Aya Nakajima
- Miki Kaoru
On the side of Evil
- Big Fire - The organization known as Big Fire is constantly causing trouble while trying to take of the known galaxy. From stealing to murders to weapons tests they are always causing trouble.
- Earth Force Psycorps - What began as a way of keeping rouge telepaths from harming others turned into a Nazi SS like organization which takes any telepath it can find and turns them into believers of the Psycorp motto, "The Corps is mother, the Corps is father." Some members have been known to use the dark side of the Force.