CRYBABY Crying Round n Round: Yuki's Plush Pendant Picks
The Lion is the one I notice first. Its rust-red mane and tiny crown interrupt the pinks and creams, and suddenly Crying Round n Round looks less like a row of soft toys and more like a little carousel cast. The Unicorn may be the secret, but it is not the only design here with a memorable outline.
I like this set most when the animal costume does more than add a pair of ears: The Horse has its loose yarn tail, The Sheep has its cream curls and sleepy face, and The Elephant almost disappears into that broad lavender head. These vinyl plush pendants have six regular designs and one secret, separate from the matching rigid-figure lineup.
The Unicorn: a secret with a different silhouette

The pale pink suit is not the whole appeal. A long ivory-colored horn rises above the white forelock, while the much fluffier pink tail gives the back a different texture from the close plush around the face. The white neck ruff and yellow saddle keep that softness from swallowing the small vinyl face.
Why this secret works for me
The tail is the detail I would miss if this were only a front-facing product shot. It changes the balance of the pendant: the horn pulls upward, the tail spreads behind, and the white forelock keeps the face legible between them. I prefer a secret that changes the silhouette, not just the color. This one does, although The Lion's mane and crown remain a very convincing regular alternative.
A short note for the secret hunt
The Unicorn's collector reference is 116.6g, with little up/down movement, restrained front/back travel and a felt side contact around the printed secret-lineup panel. The card and desiccant were also reported as louder. I would compare that combination, not chase the number alone.
Vertical-travel reports differ, and The Lion was absent from the weighed case, so this is not a proven heaviest-box rule. The bag, card and packing position can change the feel. Use only gentle comparisons where permitted; the box clues are a reference, not a reason to keep buying until the scale gives the answer you want.
The carousel is in the small details
The little saddle patches, ruffled collars and decorative beads on the hanging loops are what tie these animals together. The Horse's pink stripes feel quite different from The Lion's blue ones, while The Pig's soft bow keeps its round shape less formal. Those details make the theme visible without giving every design the same outline.
My reservation is that the small vinyl faces can look very similar in a row. That is why The Sheep's closed eyes and the stronger costume shapes matter. If only one animal appeals to you, I would not buy the whole set simply because all six coordinate.
Six regulars, six reasons to choose
The Elephant

The lavender trunk rises above the forehead instead of simply framing the face. Together with the broad, round ears, it gives The Elephant one of the widest head shapes here. The peach ruff is a good choice: it keeps the purple body from becoming one flat block of color. I like how much of the animal is expressed through that outline, before you even notice the small saddle at the side.
The Rabbit

The long, white-lined ears draw the eye upward, while the black whiskers interrupt all that soft pink. Its purple gingham collar adds another texture without competing with the face. This is the cleanest contrast with The Elephant: tall ears beside a broad head, pink beside lavender. They make a more considered pair than two nearly identical animal hoods.
The Sheep

The Sheep changes more than the outline. Its cream curls and rounded top tuft look denser than the smoother plush on The Horse, and the closed eyes make the expression genuinely different. The lavender neck ruffle stays quiet beside that fleece. This is my pick when the face matters more than the costume: it looks sleepy, rather than merely dressed as a sheep.
The Pig

The little snout sits above the hairline, with floppy ears spreading out to either side. Dusty pink fur and the salmon neck bow keep the whole body warm-toned; the pale saddle patch gives the eye a place to rest. The result is squat and rounded rather than upright. Against The Rabbit's long ears, that compact shape is the interesting difference, not just another shade of pink.
The Horse

The grey-brown suit, white forelock and dark yarn tail do the work here. A pink-and-white striped collar and yellow saddle break up the neutral body. I particularly like the tail: those separate strands make the carousel reference more convincing than an animal hood alone. This is the regular I would choose for a single pendant, because the shape still reads clearly from the side.
The Lion

A rust-red mane turns the head into a broad circle, with a small metallic crown above it. The golden body, blue-and-white collar and purple saddle make this the sharpest color contrast among the regulars. It is also the best answer to anyone who finds the rest of the palette too soft. Visually, I would not treat it as the consolation prize for missing The Unicorn; the crown and mane give it a stronger outline of its own.
Confirmed single, complete set or a secret chase?
For one favorite, choose the confirmed style. I would start with The Horse for its tail and clean side profile, The Sheep for the closed-eye expression, or The Lion for the red-and-gold head shape. Those are different reasons to buy, rather than three substitutes for an unsuccessful Unicorn chase.
For the six-regular lineup, check the set option. The TOYSEZ Complete Set separates Confirmed, which contains all six regulars, from Sealed, a factory-sealed case with a secret chance. Choose Confirmed if the six-animal group is the point; choose Sealed for the opening surprise, not as a promise of every regular plus The Unicorn.
For The Unicorn specifically, the confirmed secret is the direct choice. Its listed 1/72 odds are not a promise that any one case contains it. I would choose it for the ivory horn, white forelock and fluffy pink tail; a random box makes more sense when one of the regulars would make you happy too.
Final take
The Horse would be my first regular; The Lion would be my pick for color. The Unicorn earns a place because the horn and tail change its whole outline. Those are three designs I can explain wanting without mentioning how rare any of them is.
Reference note: English design names and pendant specifications were checked against the POP MART US pendant listing; the lineup, secret listing and set options were checked against TOYSEZ's collection. Secret-box observations are collector references, not a manufacturer identification method; packing and batch differences can change the feel.