We know that Gali fusing with two of her brothers results in the male Wairuha, so if a Toa of Water and Toa of Psionics created a Kaita with a lone male Toa, would the resulting fusion be considered female?
Followup question: what gender Matoran Nui would be created from three male and three female Matoran?
I’d imagine that in most circumstances, a Kaita or Nui would have male personalities due to the presense of mostly male hosts for the body (and the general majority of males in the MU). Of course if 3 Matoran/Toa/Turaga of each gender made up a Nui then I guess whoever forms the head and chest makes up what gender it is