Ever since we first saw Slash's suit, I'd been wondering, why use Hansel & Gretel for his base form, when Band of Bremen fits his role as the Swordsman of Sound so perfectly? If his base book was related to him being a mechanic (maybe a gremlin?) I could understand, but the candy theme comes out of nowhere.

For all the other riders, when they have a book that directly matches their theme, it's the one they use for their base form. It's most obvious with Saber using a dragon which goes with his fire element, and Kenzan using Sarutobi Sasuke to fit him being a ninja.

But in this episode where it was revealed that Daishinji's personality changes when he uses Band of Bremen and his sword has two voices (which even argue during the transformation jingles!), I think I finally get it: Hansel and Gretel are twins, and Daishinji/Slash is basically two different people in one, the painfully shy mechanic and the loud bombastic warrior.

Kinda fuzzy if this was brought up before but the white part with the zigzag lining on the chest area of the Gingaman suits? Fangs just like Daizyujin and Ryuon. It is befitting considering they are animal-themed.

It's not a hard-and-fast rule, but I noticed a pattern in how the transformation devices from W onwards are named. It seems that by default, a driver is named after the user it's introduced with, even if others later use it too. All the exceptions to this meet one or more of these three conditions:

1) Multiple riders using the driver are introduced close together.

2) The transformation device is also a weapon.

3) The transformation device is introduced with an antagonist (who'll usually get redeemed later).

Oh wow. I never realized that and it makes so much goddamn sense.

I never realized the teeth thing about the Zyurangers, but I've always got the intent behind the Gingaman suits because the morphing stock footage in Lost Galaxy has a clear "chomping" motion at the start that makes it obvious.

As I’ve mentioned, watching Decade for the first time and now realizing that the home base being a watch store in Zi-O is a callback to the camera shop in Decade

All these years I thought it was some sorta random ambiguous tribal pattern thing, but then I realized hold up, they are animal motifs. Wait a second, Daizyujin had teeth patterns. And then it just clicked. :lolol
Now it just looks way cooler than I thought it did. I always liked the helmet designs but could never get across why their suit was designed that way until recently. And I guess the gloves and boots are following the same idea as well with how the edges are decorated with the same pattern.

Yeah, I am not sure about the Zyuranger suits but Daizyujin's I can definitely say those are teeth.

It just hit me that the Giga Gaburevolver's red-and-blue coloration matches Torin's unmorphed face.

Well I feel pretty stupid as I just noticed that the Ohrangers/Zeo Rangers' helmets have mouths.

Yeah, Zeo Black and Zeo Red are really hidden but once you do, you can't unsee it. I actually find Zeo to have the weirdest "mouth on helmet" design.