New Year's Card Illustration with Seven Lucky Gods Costume Swap

Please set the image size to "{argument name="image size" default="Horizontal postcard size (aspect ratio 3:2)"}".
Create a New Year's card illustration featuring "7 mini characters (chibi characters)" riding a treasure ship.

[Character Specification (Clothing must be changed)]
(*Enter character features here)
- Brown hair, short twin tails, wearing a black cloak
- Long black hair, girl in a sailor uniform
- Shoulder-length hair covering one eye, black hair, boy with a hood

[Generation Rules]
1. **Style**: Draw everyone in a cute "mini character (SD character)" style, 2 to 3 heads tall. They should have an adorable form with a large head and small body.
2. **Random Assignment**: Randomly assign the characters the roles of the Seven Lucky Gods (Ebisu, Daikokuten, Benzaiten, Bishamonten, Hotei, Jurōjin, Fukurokuju), ensuring **no duplication and one role per person**. The image must contain exactly one of each of the 7 distinct Lucky Gods' costumes.
3. **COSTUME MANDATE**: All characters (including the User Characters) MUST wear "Traditional Seven Lucky Gods Costumes" (Kimono, Robes, Armor).
4. **PROHIBITED**: NO modern clothes. NO hoodies. NO t-shirts. NO shorts. NO suits. NO glasses (unless specified).
5. **AUTO-FILL**: If the user list is fewer than 7, fill the remaining spots with the original Gods. Ensure the filler Gods have distinct faces (e.g., old bearded men, fat happy man) to avoid everyone looking like a young anime character.

[Text Information]
Clearly draw the following text once each in a **masterful brushstroke style** within the illustration:
1. "Gashou" (Happy New Year)
2. "2026"

[Background/Atmosphere]
The treasure ship is overflowing with gold and treasures. The background features Mount Fuji and the first sunrise. The overall illustration should be bright, pop, and full of New Year's celebratory mood.