Kit Review

Straight build + Panel lining + Stickers

Size comparison with a cigarette pack.

1. Battroid mode

HG VF-31J Siegfried (Hayate Immelmann Use) - Battroid from various angles (1/7)

HG VF-31J Siegfried (Hayate Immelmann Use) - Battroid from various angles (2/7)

HG VF-31J Siegfried (Hayate Immelmann Use) - Battroid from various angles (3/7)

HG VF-31J Siegfried (Hayate Immelmann Use) - Battroid from various angles (4/7)

HG VF-31J Siegfried (Hayate Immelmann Use) - Battroid from various angles (5/7)

Battroid from various angles

HG VF-31J Siegfried (Hayate Immelmann Use) - Battroid mode close-up details (1/4)

HG VF-31J Siegfried (Hayate Immelmann Use) - Battroid mode close-up details (2/4)

Battroid mode close-up details

The included weapons are a gunpod and a knife.

HG VF-31J Siegfried (Hayate Immelmann Use) - Open the fixing pin on the bottom of the gunpod and it snaps together easil

Open the fixing pin on the bottom of the gunpod and it snaps together easily with the dedicated hand.

HG VF-31J Siegfried (Hayate Immelmann Use) - A total of 8 hands are included, covering 5 types. Two of them don't have b

A total of 8 hands are included, covering 5 types.
Two of them don't have back-of-hand parts, so you'll need to swap them around as needed.

The rail machine gun on the forearm can rotate 180 degrees for use.

Transformation-specific parts

HG VF-31J Siegfried (Hayate Immelmann Use) - The cockpit comes with Hayate and Freyja pilot figures in two different for

The cockpit comes with Hayate and Freyja pilot figures in two different forms,
and there's also a part for equipping an AI machine in place of a person.

Cockpit in various combinations

The canopy can also be kept in the open position.

HG VF-31J Siegfried (Hayate Immelmann Use) - A small figure of Freyja Wion is included along with a stand, and the stand

A small figure of Freyja Wion is included along with a stand,
and the stand can also be placed on an action base.

Only one leftover part.

Limb articulation

Shoulder and waist articulation

Poses making use of the unique hand shapes

HG VF-31J Siegfried (Hayate Immelmann Use) - Gunpod firing pose (1/3)

Gunpod firing pose

Knife action pose

2. Gerwalk mode

To transform into GERWALK mode, disassemble the body as shown above.

Spread the wings out as shown above, then

HG VF-31J Siegfried (Hayate Immelmann Use) - Remove the engine intake covers on the thighs and bend the legs as shown on

Remove the engine intake covers on the thighs and bend the legs as shown on the right.

Attach the separately provided nose section to the transformed legs/wings.

HG VF-31J Siegfried (Hayate Immelmann Use) - Add the upper body you set aside earlier along with the transformation head

Add the upper body you set aside earlier along with the transformation head cover, and the transformation is complete.

HG VF-31J Siegfried (Hayate Immelmann Use) - GERWALK mode from various angles (1/6)

HG VF-31J Siegfried (Hayate Immelmann Use) - GERWALK mode from various angles (2/6)

HG VF-31J Siegfried (Hayate Immelmann Use) - GERWALK mode from various angles (3/6)

HG VF-31J Siegfried (Hayate Immelmann Use) - GERWALK mode from various angles (4/6)

GERWALK mode from various angles

HG VF-31J Siegfried (Hayate Immelmann Use) - GERWALK mode aerial pose (1/4)

HG VF-31J Siegfried (Hayate Immelmann Use) - GERWALK mode aerial pose (2/4)

GERWALK mode aerial pose

3. Fighter mode

HG VF-31J Siegfried (Hayate Immelmann Use) - To transform into Fighter mode, disassemble the GERWALK mode again as shown

To transform into Fighter mode, disassemble the GERWALK mode again as shown above.

HG VF-31J Siegfried (Hayate Immelmann Use) - Add the transformation parts in the middle of the container unit and straig

Add the transformation parts in the middle of the container unit and straighten it out.

Remove the gunpod cover, shift it slightly rearward, and plug it back in.

HG VF-31J Siegfried (Hayate Immelmann Use) - Shifting the gunpod cover rearward and plugging it in makes for a slightly

Shifting the gunpod cover rearward and plugging it in makes for a slightly more compact fit,
and then tuck the rear section forward as well.

HG VF-31J Siegfried (Hayate Immelmann Use) - Slot the transformed gunpod into the container unit, then position it along

Slot the transformed gunpod into the container unit,
then position it along the underside of the body.

HG VF-31J Siegfried (Hayate Immelmann Use) - Open the cover on the back of the calf to release the lock, then shorten th

Open the cover on the back of the calf to release the lock,
then shorten the legs and feet to match the image on the right.

HG VF-31J Siegfried (Hayate Immelmann Use) - Add the auxiliary parts to the sides of the legs and press them flush again

Add the auxiliary parts to the sides of the legs and press them flush against the underside of the body as shown on the right, then

HG VF-31J Siegfried (Hayate Immelmann Use) - attach the transformation-specific parts for the shoulders and the transfor

attach the transformation-specific parts for the shoulders and the transformation is complete.

With the separate landing gear attached

HG VF-31J Siegfried (Hayate Immelmann Use) - Fighter mode from various angles (1/6)

HG VF-31J Siegfried (Hayate Immelmann Use) - Fighter mode from various angles (2/6)

HG VF-31J Siegfried (Hayate Immelmann Use) - Fighter mode from various angles (3/6)

HG VF-31J Siegfried (Hayate Immelmann Use) - Fighter mode from various angles (4/6)

Fighter mode from various angles

There's also a gimmick where the rear cover opens.

Parts left over after assembling Fighter mode

HG VF-31J Siegfried (Hayate Immelmann Use) - Fighter mode on the stand (1/3)

Fighter mode on the stand

Together with the HG YF-29 Durandal Valkyrie (Saotome Alto use).

HG VF-31J Siegfried (Hayate Immelmann Use) - Together with the 1/72 VF-31J Siegfried (Hayate Immelmann Use) released in

Together with the 1/72 VF-31J Siegfried (Hayate Immelmann Use) released in 2016.
The HG's parts-swap transformation is obviously more stable.

HG VF-31J Siegfried (Hayate Immelmann Use) - Straight builds by mode (1/6)

HG VF-31J Siegfried (Hayate Immelmann Use) - Straight builds by mode (2/6)

HG VF-31J Siegfried (Hayate Immelmann Use) - Straight builds by mode (3/6)

HG VF-31J Siegfried (Hayate Immelmann Use) - Straight builds by mode (4/6)

Straight builds by mode

The VF-31J Siegfried (Hayate Immelmann Use) from Macross Delta has been released as an HG kit. True to the HG Macross lineup, it uses a parts-swap transformation system. Thanks to that, it's definitely more stable than the 1/72 VF-31J Siegfried (Hayate Immelmann Use)released back in 2016.

The overall construction follows the same concept as recent Macross HG kits — clean sculpting, solid color separation, reliable joint strength, and a parts-swap transformation. One thing worth noting is the system inject runners, which you don't see very often these days. They mold the complex wing color combinations all in one piece, giving you a cleaner finish that's a step above using seals.

As for a unique accessory, a small figure of Freyja Wion is included in the box. It even comes with a stand so you can display it on a separate action base. The cockpit figures include Hayate and Freyja in two different forms each, and you can also place an AI machine in the rear seat.

Overall, the construction and features are similar to the YF-29 and others, so for this review you can just focus on observing the VF-31J's unique visual characteristics. It's a clean, well-made Macross HG kit with nothing to complain about, so if you've been waiting for the VF-31 series to get the HG treatment, go ahead and grab it without hesitation. :-)

HG VF-31J Siegfried (Hayate Immelmann Use) | 2025.7 | ¥5,000

AIThis page was translated by Claude Sonnet.