From Destinypedia, the Destiny wiki
The Weavers are a group of Vex programming, who were last seen on Venus. They are known for searching and recovering Axis Minds, who are either destroyed or lost from the Vex Network, by using Time Travel to find the lost Mind and bring it back from that timeline to theirs. A notable Weaver would be Theosyion, the Restorative Mind in the Echo Chamber, who was sent by the Vex Network to bring back Sekrion, Nexus Mind to continue the converging Venus into a Machine World.
List of appearances