Resized to 73% of original (view original)
Artist's commentary
2021 Carpaccio Birthday
Happy Birthday to Carpaccio-san in 2021!!!
Paccio-chan's birthday is in December, and December means "paulownia"!
Paccio-chan's birthday is also the last among the GuP characters, and so "paulownia"!
That being said, the original source is the Hanafuda playing card called "paulownia"!
Paulownia - a type of flower, and in Hanafuda it represents the number 12, or the last month of December.
Source: https://fudawiki.org/en/hanafuda/suits/paulownia