Size comparison of the C-Pack NT-D activated mode next to a cigarette pack.

Skirt interior detail

The beam rifle actually has some nice frame detail too.

Underside

Cockpit hatch open

Pull out the rear section of the nose and fold down the vertical stabilizers.

There's an empty space inside the Core Block...

Finally, close the cockpit cover armor and the combination is complete.

At this point, make sure the two wings on the back are tucked inside the waistband(?) of the lower body.
Otherwise it ends up looking like a shirt hanging out over your pants...

The NT-D psycho-frame comes in two versions — clear pink (activated) and gray (deactivated).
The pink frame on the left is a newly sculpted frame with more diagonal molding compared to the original Unicorn.
The gray frame on the right reuses the frame runners from the MG Unicorn Gundam.

Additional parts needed when installing the psycho-frame

First, tilt the top cover of the upper body backward and expand the chest armor forward and downward as shown.

Slide the chest psycho-frame parts in from the side, then close the bottom to lock them in.
In the original MG Unicorn Gundam these parts faced forward, but on the Narrative Gundam they need to be mounted sideways.

Open the backpack cover and remove the inner block, then detach the two panel mounting pieces.

put it back inside the backpack and close the cover.

Pull the bottom of the front skirt downward to release the lock, then
detach the two front armor pieces.

Slide part of the shoulder armor to expose the opening, then

The completed shoulder psycho-frame

Slide the wrist section out as shown, then

Bend the knee fully, then detach the lower knee cover and slide it down,
and gently pull the small tab in the middle of the knee forward.

Fitting the knee psycho-frame parts is trickier than you'd expect,
but read through the manual carefully and practice a few times and you'll get the hang of it.

Pull the lower knee cover back toward the psycho-frame until it clicks into place.
The knee frame retention in Destroy mode on the old MG Unicorn got a lot of flak for being too loose,
but this time they've made it really solid.

Close the foot cover as shown and add the psycho-frame parts to the ankle as well — installation complete.
Make sure to press the foot cover down firmly until you hear a "click."

Body parts left over after installing all the psycho-frame pieces

Cockpit hatch open

Just like the Nu Gundam, there are movable anchors on the front and back of the feet.
The gimmick is there, but it's not explained anywhere in the manual..

Open the cover on the rear end and a large hole is exposed. (Quite the strategic location..)
It's meant for mounting on a stand — you can use it with an Action Base that has a larger peg size.

Weapons loadout

The beam rifle's magazine is detachable, and two of them are included.

Only two hand options are included: a closed fist and an articulated hand.

The beam rifle's attachment method is unique — first you detach the rear portion of the grip.

With that detached part now fully locked onto the hand, you plug the whole thing into the beam rifle.
It's a connection method I've never seen before — instead of simply pressing a peg in,
it slides onto a T-shaped pin perpendicular to the direction of force, which gives it an incredibly strong grip.
If you grab the beam rifle and pull, the wrist comes off before the rifle does. (The sheer determination to never let go)

The beam saber can also be secured to the palm peg, though it's not quite as stable as the beam rifle.

There's an opening gimmick on the top of the rear skirt..

Leftover parts from the psycho-frame runners recycled from the MG Unicorn Gundam

Articulation that puts the MG Unicorn to shame

The elaborate articulation gimmicks inside the legs.
Thanks to them, not just the knee but the lower leg bends as well.
This kit is just packed with all kinds of gimmicks inside the frame.

Forward/backward shoulder articulation.
You can pull the shoulder joint itself slightly outward and then pivot it.

The articulated fingers move in three blocks — thumb, index finger, and the remaining three —
while the fingertips of all five fingers are individually articulated.
It holds poses much better than those clunky injection-molded fully articulated hands,
though the fingertips do occasionally pop off during posing.

There's a locking pin inside to keep the waist rotation joint from pulling out,
so you have to insert the waist sideways at 90 degrees and then rotate it to face forward.
Thanks to this, the waist joint will never come apart, but the core block can sometimes separate when you pick up the model by the upper body,
so it's worth making sure the core block is locked in firmly.

Together with the inner frame from the HGUC Narrative Gundam A-Pack.

Together with the HGUC Narrative Gundam C-Pack.