I had included these characters in my previous post, but figured I should remove them since I wasn't going to talk about characters like Ninjaman or Signalman. Because while nobody counts these two, I really like 'em. You know Bandai was obviously shitting bricks when they realized GoGoFive wouldn't be having six heroes ("They'd have to change their name to GoGoSix!"), but I thought the story was a bit crafty in how they approached the idea of a sixth. (I also have to give credit to Power Rangers for creating their own sixth since GoGoFive lacked one -- Titanium Ranger is pretty neat looking.)
I know some people think that Jiku doesn't fit in with GoGoFive, introducing an alien character, but I always preferred to look at Jiku as...not really being an alien from space, but maybe an angel from Heaven. (There also seems to be something angelic about the artwork of Jiku Jienne on the Laserdisc cover, emitting light.)
It's awesome enough that Keiichi Wada plays Jiku (and is reunited with Ryuu Ranger suit actor Naoki Oofuji), but the best part of this movie is that Kyoko's prayers are answered in that she gets to be a hero. Even if briefly, having her transformation be the centerpiece of this one-off movie special made it stand out, and she gets to help the GoGoFive, even getting to deliver the "Sword, show the light" line for Victory Robo. (What a difference an additional hero can make, what an impact they can have when their arrival isn't about selling toys, huh?) It's just too bad that this movie was made at a point when toku movies tended to be stand-alones, with events never affecting the actual series or continuity, so they never really care to match up with the show. I mean, it would have even been nice to show Kyoko in a later episode wearing the necklace made from Jiku's crystal. That's simple enough, why couldn't they even just do that!?
Nevertheless, the GoGoFive movie is one of the best Sentai movies, IMO, and worth checking out. (And worth jumping on the bandwagon of "Jiku is awesome, let's mention him whenever we talk about extra heroes.")