Episode 40 - Chasing After Princess Dia!!

Chasing After Princess Dia!! (プリンセスダイヤを追え！！) is the fourtieth episode of the Aikatsu Stars! Anime Series. It aired on January 19th, 2017.

Summary
The special drama Ako appeared in as a rookie detective, "Aikatsu! Detective - The Princess Dia Incident", has finally broadcasted! The criminal department in which Ako has been appointed to receives a letter of notice. The letter is from a trio of girls known as the Phantom Thief Shadow Stars. The girls say they never miss their targeted prey, leading the detectives to become fired up about arresting them--!

Characters

 * Ako Saotome
 * Yume Nijino
 * Tsubasa Kisaragi
 * Hime Shiratori
 * Yuzu Nikaidō
 * Yozora Kasumi
 * Mahiru Kasumi
 * Laura Sakuraba
 * Yuri Ashida
 * Lilie Shirogane
 * Hikaru Moroboshi
 * Nozomu Igarashi
 * Asahi Kasumi
 * Kanata Kira
 * Momoko Yachigusa

Trivia

 * The Phantom Tuxedo, Star Patrol and Sharp Patrol Coord make their debut in this episode.
 * Lock On You makes its debut as an insert song.