Father Garret was a man from Lyra's world who was loyal to the Magisterium. His dæmon was some form of beetle or fly. Whilst visiting Marisa Coulter's flat with Hugh MacPhail, Garret caught Lyra Belacqua listening in on Marisa Coulter's conversation with MacPhail and approached her, asking who she was. As he did this, Marisa opened the door, dismissed Lyra and showed the two men out.
When Marisa went to the Magisterium to talk with MacPhail and Cardinal Sturrock, Garret showed her the way. When she asked him where everyone was, she joked that it was because she was there however Garret did not understand.