Board Thread:Naruto Discussions/@comment-25228549-20140821104935/@comment-28861328-20140824200054

SuperSaiyaMan wrote: It isn't just logic. Several of the Tailed Beasts have sexual dimorphism and are given male pronouns.

That is logic. Seel and some of the others around here have to have "Male" (or you know, "Magnet Release"... or "Yin-Yang Release') written in big bold letters for anything to get done, so Ulti is just honoring their requests.