30ms Sis-Tc20g Tukirna-Diearthinnocent Form

The box art and design (as well as several other 'sisters') is by character designer Humikane Shimada, the father of mecha-musume and original designer of Frame Arms Girls.

We have to talk about the name, because they butchered the romanization.
Her name is Tsuki-Luna, which is essentially... Moon-Moon, as a reference to the story of the rabbit that ascended to the moon, making mochi (which is why she has a giant pestle hammer). Diearth is "Di Āsu", which either means 'dears' or 'dias'.
For whatever reason, they thought "Tsuki-Luna Dears" would look appropriate as "Tukirna Diearth", which kind of reads like a small female Turk about to kill the planet, at least if you don't read it just right.

#11 Tsuki-Luna is the superform combination of #06 Lirinel and #07 Laranel, the bunny twins and in particular their gear, with her lance/hammer, her own unique and bigger headband, and mechanical wings (or bunny ears?) attached at her lower back.

Aesthetics:
Tsuki uses the smallest T size body with Color A skin and despite her smaller face (it's set lower to exaggerate her smaller size), it's a normal face plate size, unlike some models, like Sourei, who use a smaller one.

Tsuki and her two predecessors, are bunny themed Sisters, using that 'tech suit' look that most of the early 30MS line has.
She only has black and (metal injection) gold for her outfit, using her skin to break up the colors, along with the transparent golden-yellow ring parts.

Mechanics/Compatibility:
It's a fairly standard early-to-mid 30MS model with balls in her hips instead of rockers (no thigh seam lines) and double jointed knees, but her armored limbs, the arms specifically, use C-clip elbows.
The pestle partsforms into a lance.

Since it's a partial remake of the twins, there are a lot of extra parts. Tsuki uses a new lower torso, but there's an old one as well, compatible with her black/gold midriff, if you prefer that. The lower back is skin colored however.

While Tsuki uses a more mature bust, she also comes with the two smaller ones (slight cleavage/covered) with the smaller bunny logo in gold, as well as a tan one with a 3mm hole and attachment for equipping 30MS chest armor. They all use the tiny double pegs and the body is not compatible with other bust types, so it's nice to have options.

The kit has Lirinel's headphones and smaller ears which specifically only fit onto her and Laranel's bangs, but the Volume 8 "Straight Hair - Brown 3" (matches Tsuki's hair color) has the exact bangs needed to equip them - this DOES fit onto Tsuki's twin-tail hair, set and all.

Because Tsuki has the armored limbs, it means you essentially get a free pair of (small) legs and arms to use with another kit, which is sorely needed in 30MS!

The kit comes with a lot of extra parts due to reusing molds, so she also has the sitting position skirt and the hand-holding hands that the twins have (d'aww).

Conclusion:
Definitely one of the best 30MS kits, for all the stuff and extra alone, but it helps that it's a great fully armored kit that also looks good. Tsuki herself has some great expressive faces, one with a rare toothy grin and sparkly eyes, and the outfit looks good, with the gold hitting an okay tone (no 'curry' gold here).
Of the ~20 sisters I own, this instantly jumped to a top 3.

The box art and design (as well as several other 'sisters') is by character designer Humikane Shimada, the father of mecha-musume and original designer of Frame Arms Girls.

We have to talk about the name, because they butchered the romanization.
Her name is Tsuki-Luna, which is essentially... Moon-Moon, as a reference to the story of the rabbit that ascended to the moon, making mochi (which is why she has a giant pestle hammer). Diearth is "Di Āsu", which either means 'dears' or 'dias'.
For whatever reason, they thought "Tsuki-Luna Dears" would look appropriate as "Tukirna Diearth", which kind of reads like a small female Turk about to kill the planet, at least if you don't read it just right.

#11 Tsuki-Luna is the superform combination of #06 Lirinel and #07 Laranel, the bunny twins and in particular their gear, with her lance/hammer, her own unique and bigger headband, and mechanical wings (or bunny ears?) attached at her lower back.

Aesthetics:
Tsuki uses the smallest T size body with Color A skin and despite her smaller face (it's set lower to exaggerate her smaller size), it's a normal face plate size, unlike some models, like Sourei, who use a smaller one.

Tsuki and her two predecessors, are bunny themed Sisters, using that 'tech suit' look that most of the early 30MS line has.
She only has black and (metal injection) gold for her outfit, using her skin to break up the colors, along with the transparent golden-yellow ring parts.

Mechanics/Compatibility:
It's a fairly standard early-to-mid 30MS model with balls in her hips instead of rockers (no thigh seam lines) and double jointed knees, but her armored limbs, the arms specifically, use C-clip elbows.
The pestle partsforms into a lance.

Since it's a partial remake of the twins, there are a lot of extra parts. Tsuki uses a new lower torso, but there's an old one as well, compatible with her black/gold midriff, if you prefer that. The lower back is skin colored however.

While Tsuki uses a more mature bust, she also comes with the two smaller ones (slight cleavage/covered) with the smaller bunny logo in gold, as well as a tan one with a 3mm hole and attachment for equipping 30MS chest armor. They all use the tiny double pegs and the body is not compatible with other bust types, so it's nice to have options.

The kit has Lirinel's headphones and smaller ears which specifically only fit onto her and Laranel's bangs, but the Volume 8 "Straight Hair - Brown 3" (matches Tsuki's hair color) has the exact bangs needed to equip them - this DOES fit onto Tsuki's twin-tail hair, set and all.

Because Tsuki has the armored limbs, it means you essentially get a free pair of (small) legs and arms to use with another kit, which is sorely needed in 30MS!

The kit comes with a lot of extra parts due to reusing molds, so she also has the sitting position skirt and the hand-holding hands that the twins have (d'aww).

Conclusion:
Definitely one of the best 30MS kits, for all the stuff and extra alone, but it helps that it's a great fully armored kit that also looks good. Tsuki herself has some great expressive faces, one with a rare toothy grin and sparkly eyes, and the outfit looks good, with the gold hitting an okay tone (no 'curry' gold here).
Of the ~20 sisters I own, this instantly jumped to a top 3.