Benny Ninja-- like Ms. J, the "Aswirl Twins" and a few others Tyra has featured-- comes from the tradition of drag balls in the urban black community. They've been going on in Harlem for close to 100 years now, and were documented in Jennie Livingston's film "Paris Is Burning", which I believe is still on Netflix Streaming.
In that film, one of the interviewees in the late Willie Ninja, "father of the legendary House of Ninja" (i.e., head of a group/"family" of drag queens taking the name "Ninja"). He is shown coaching women in movement classes and talks about his work with designers and appearances in music videos. This was during Tyra's early years, and while I'm not sure if she worked with him, I'm sure she knew plenty of others who had.
Benny Ninja is Willie's protogee, a member of the "House of Ninja," and is one of a number of men like Ms. J who actually work with fashion models coaching runway and other movement.
While it may seem strange to go to a drag queen for this, remember that a large part of the illusion they create is the way they carry themselves and how they move. They're masters/mistresses of the art of presenting oneself on stage/runway.