- William has other uses. Please see William (disambiguation) for other meanings.
William was a member of Byron's group of rogue telepaths.
William followed Byron and the other telepaths to Babylon 5 in 2262. He was often seen in the background with the others. William as well as many of Byron's telepaths temporarily worked for the Alliance in Covert Intelligence under Garibaldi and was seen being interviewed and briefed by him about the job. When Byron rebelled against Sheridan and the Alliance scanning several ambassadors in order to blackmail them into giving them a homeworld of their own, William naturally played along but did not join the violent ones led by Thomas who chose to fight. When Byron and several others committed suicide, William was not amongst them and is seen leaving the station remembering Byron with Lyta. He may have joined the resistance. His fate is unknown.
Byron described him as shy and quiet but quite interesting when people got to know him.
- William was never shown speaking.