Apparently she’s been a hidden funeral object all along.
WPP2-JP049 瓔珞帝華-ペリアリス Youraku Teika – Periallis (Periallis, Yoraku Empress of Blossoms/TCG: Periallis, Empress of Blossoms)
Note: A 瓔珞 (Yoraku) is a necklace or ornament shaped like how Periallis, commongly used by Indian nobility or adorning Buddhist statues, and is sometimes used as Buddhist Funerals. The Yorakuran is also a plant known by its nomenclature of Oberonia japonica, which looks heavily like the ornament / necklace in question.