Who is Littlejohn from The Fifth Sacred Thing and what is their importance?

Littlejohn is Bird's lover while in prison. Although Littlejohn seems to have known Bird for much of the ten year stay in prison, Bird seems to know little about Littlejohn. Littlejohn escapes prison with Bird, but he opts to stay with the Monsters instead of going to the City with Bird. When Madrone heads south, she reunites briefly with Littlejohn. This character is undeveloped, and his brutal death during a raid by steward armies is only mentioned in passing.