HGBuild Divers

Nepteight Unit

The armor pack that finally makes Core Gundam II feel like its own machine again.

MechaGrade Score

3.7/5

Nepteight Unit · 1/144 · 2020

GradeHG

Scale1/144

Released2020

Runnersn/a

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The verdict

This is the Core Gundam II armor set I'd point you to first if you're only buying one.

It has a real backpack, a real transformation gimmick (Voiture Lumiere cruising mode), and a color scheme that actually reads as a character rather than a reskin. The connection to Core Gundam II is fussier than it should be, and there's a lot of gold that only exists as foil stickers, but the shape and the gimmick carry it.

Best for: Build Divers fans who already own a Core Gundam II and want the armor that feels the least copy-paste of the bunch

The full review

What it is

The Nepteight Unit is the armor set built for Hiroto's Core Gundam II so the Build Divers could reach Eldora using the Voiture Lumiere system borrowed from Stargazer Gundam. On the shelf it's the most distinct of the Core Gundam II armor line because it actually gives the suit a backpack, something the other Planet Armors skip. The cruising units on the arms and back fold out into a wide, wing-like flight silhouette that's genuinely satisfying to swing between modes. Building it, I found the parts count light and the assembly quick, but the transformation gimmick gives it more personality per piece than most HG accessory kits manage.

The catch

The gold trim across the whole unit is foil stickers, not molded plastic, so color separation depends entirely on how carefully you apply them and how they hold up over time. The bigger complaint I see echoed across builders is the docking connection to Core Gundam II itself: the tolerances are tight and the peg alignment is finicky, so don't be surprised if it takes several tries to seat it cleanly. This is also an armor/accessory set, not a standalone mobile suit, so you're buying it to sit on top of a Core Gundam II you already own or plan to own.

Who it's for

Buy this if you're building out the Build Divers Re:Rise cast and want Hiroto's Gunpla to look like its own thing instead of an Uraven or Saturnix repaint with different stickers. It's also a fun pickup if you just like transforming backpacks and don't mind that half the kit's identity depends on foil application. Skip it if you don't already own or want a Core Gundam II, since this set does nothing on its own, or if sticker-heavy gold trim is a dealbreaker for you.

The build story

What the build is actually like, and the engineering worth knowing about.

Assembly is straightforward and quick, in line with a light HG accessory kit rather than a full mobile suit. Gate placement is typical Bandai HG, easy to clip and clean with a basic nipper and file. The sticker sheet is the main time sink here since the gold trim across the wings and torso panels is foil rather than molded plastic, so patience during application pays off more than usual.

The standout is the transformation itself: the arm and back cruising units fold out into a wide flight-mode silhouette that's the closest thing this armor line has to a real gimmick, and it's the reason the Nepteight feels less like a reskin than its Uraven and Saturnix siblings. The tradeoff is the docking interface to Core Gundam II, where builders consistently report tight tolerances that take a few tries to align and seat properly.

Lore & trivia

01The Nepteight Gundam is Core Gundam II docked with the Neptune Armor through the PLANETS System, giving Hiroto Kuga's Gunpla its Build Divers Re:Rise identity.
02The Neptune Armor's cruising units activate Voiture Lumiere, the same interplanetary propulsion system used by Stargazer Gundam, letting the Build DiVERS reach Eldora for the series' climax.
03It appears in the penultimate episode of Gundam Build Divers Re:Rise, built in a rush by the whole Build DiVERS team to finish in time before the satellite cannon fired.
04Of the various Core Gundam II armor kits, Nepteight is the only one with a proper backpack, a deliberate callback to the older Core Gundam I-era kits rather than the newer Planet Armor line.