Ability ⇢ Princess’s Curtain
As long as this Pokémon is in the Active Spot, whenever your opponent plays a Supporter card from their hand, prevent all effects of that card done to your Benched Basic Pokémon.
{C} → Spike Draw : 20
Draw 2 cards.
illus. Haruko Ichikawa
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It can instantly create many diamonds by compressing the carbon in the air between its hands.
Chiffon
Haruko Ichikawa is best known the creator of the Land of the Lustrous manga, which is releasing its 108th and final chapter on April 25, a few days from now. Her sole TCG illustration seems to be a reference to her work since Diancie is categorized as the Jewel Pokémon (Houseki in Japanese) and the manga stars an ensemble cast of sentient human-like gemstones called Houseki.
She is also one of the character designers for recent core series Pokémon games. I think it’s confirmed she worked on Chairman Rose and Oleana, but people have theorized she designed Penny and some of the Ultra Beasts…
Zomus
Oh wow I did not realize that she was the author of Houseki no Kuni!
Very fitting for her to illustrate this card.