He was the leader of the drow settlement in Ultoksamrin, which made him the leader of the Vault of Cloaked Midnight. Originally, the temple was built by drow escapees from the drow city of Guallidurth. The settlement experienced an influx of drow refugees when the surface city of Allsihwann was destroyed by the combined forces of surface elves and Tethyr.
Despite this background, Vokkrzyr Rualfren advocated cooperation with surface elves in their fight against Lolth and her priestesses, in this case against the temple city of Guallidurth. While his invitation and willingness for such cooperation was widely known, it wasn't known how much success he had with recruitment efforts.