Arrest Lupin with Horoscopes

The Astrology Project: ICPO's special operation. Marianne, who can predict all of Lupin's actions via scrying with her crystal ball, is the opponent this time. The objective is Poseidon's Tear, an emerald which is the sign of the king of the country of Danmal. Goemon, charmed and mesmerized by a strange pigeon, tries to cut Lupin! Marianne wants the Emerald for herself. What is her gimmick?