They look like they're doing various disco poses, which coincidentally were very popular to do when "Battle Fever" first came out in 1979. This might also possibly be the only time that the Sentai writers have ever been cool enough to give us an Orange ranger and not force other people to make one of their own! I sure wish they'd do it more often!
Kat ranger was not an Orange ranger, she was a white ranger! And not a very good one at that either as she only lasted for one episode on PRSPD! Are you sure you're not thinking about Boom from the PRSPD episode "Boom?" Technically, that's not a real Orange ranger because it didn't come from Sentai footage!
Phantom is black with some silvers on him, Shadow is black with metallic blue helmet, Omega Ranger is white with some dark blue on him, and Nova Ranger is a Silver Ranger.
"Phantom is black with some silvers on him, Shadow is black with metallic blue helmet, Omega Ranger is white with some dark blue on him, and Nova Ranger is a Silver Ranger." Which would mean Kat Ranger is the Orange Ranger
And the Magna Defender is basically a black ranger with yellow horns and a green hexagon on his chest and a red cape. That basicly says that Kat can be Orange