[TheJaz]

Also, the "Oni Taiji" in "Don Oni Tajin" literally means "Defeat the Demon", (source) which makes me question there being a demon themed Ranger on the team like the alleged "OniSister", if the team is also destroying demons

Which tbf out of most of these rumours "OniSister" is one of the ones with the least backing behind it, so far all of the presumed real/reliable leaks only talk about Red, plus at least one claim that the black Ranger is CGI

Until we see more, I feel like any specifics about the team outside of those two claims (Red and Black) are better to take as speculation that's gotten out of hand