Data as Ihat
Ihat was one of many of the D'Arsay people to "possess" Data in 2370.
He was among the most boisterous, and the first to reveal the sign for Masaka's temple to Captain Picard, although Masaka 'punished' him before he could fully reveal the sign. While scornful of Masaka, he had a grudging respect for her powers when she was awake. (TNG: "Masks")