Arrow's wife was only metioned once. But in The Saga of Larten Crepsley Ocean of Blood we find out she is a "beautiful, loving woman" and that she has red hair.
In The Saga of Larten Crepsley: Palace of the Damned, we find out that a Vampaneze had challenged Arrow to a duel. When he had refused, the Vampaneze kidnapped Sarah. Only then had Arrow accepted. When Arrow had let him go, unwilling to kill him due to the fact that Sarah hadn't like blood well, the Vampaneze threw a knife. To Arrow's shock, it was projected at Sarah. She soon died and Arrow went arround challenging multiple Vampaneze for revenge.