A blonde girl who often gets delusional concerning the relationship within the group, named after Cordelia Gray. She tends to get rather delusional whenever she is scared. Her Toy allows her to see and hear things others cannot. Cordelia likes to draw; however, her drawing skills aren't that good. She usually draws Milky Holmes together in the flower fields or just flowers.   

(Source: Wikipedia) 

The protagonist of this story, Sendo Aichi, is a timid boy in his third year of middle school. He had been living his life looking backward rather than forward, trying not to stand out. However, he had one thing that kept him going - the "Blaster Blade," a card from a card game that was given to him when he was little. That card is the reason why he begins to engage in Card Fights, something that changes his life drastically. 
The name of the card game is "Vanguard." The game takes place in a different planet called "Cray," and due to a never before seen play system, it becomes popular throughout the world. 
Aichi, immediately attracted by Vanguard, meets friends such as Tokura Misaki and Katsuragi Kamui, along with other rivals. Through friendly rivalry with them, Aichi begins to enjoy a fulfilling life. Aichi, however, has a goal: to once again battle with a Vanguard Fighter by the name of Kai Toshiki. Kai Toshiki is an aloof and cold-hearted high schooler who has outstanding abilities in the world of Vanguard. He is also the reason why Aichi started playing the game. For him, Toshiki is the person who saved him from his boring life and introduced him to Vanguard. In order to get better at Vanguard, Aichi puts his soul into it every day. He wishes that someday, he'll be able to battle Toshiki and have him recognize his worth. 
(Source: Crunchyroll)

"Sheryl, Nero, Elly, and Cordelia are the most popular students at Holmes Detective Academy, because of the many cases they've solved with their Toys and teamwork. The students and the people of the Detective City Yokohama all look up to the members of "Milky Holmes", as they're called. But on a dark and stormy night, during a battle with their rivals "The Gentlemen Thief Empire", they lose their toys, and their fate undergoes a dramatic change..." 
(Source: Crunchyroll)

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Second season of Tantei Opera Milky Holmes.

After the events of Link Joker-hen, Takuto Tatsunagi announced an invite-only tournament in a dream, and invited both Aichi and Kai to take part in "Messiah Scramble". The prize being the card named "Messiah", the name of a saviour that was heard in a dream. At the same time, there were many incidents of units disappearing from Vanguard cards throughout the world. Aichi and Kai team up to a confront an enemy that threatens the peace they've just regained. 
 
The movie is a prequel to Legion, leading up to Aichi's disappearance.

The film will feature a three-way battle between The Gentlemen Thief Empire, the Genius 4, and the Milky Holmes groups. Just as the Milky Holmes group is settling down to relax at a hot spring after their study tour, an alarm goes off, because The Gentlemen Thief Empire intend to steal a treasure. The two groups start to battle for who gets to use the "Toys," when suddenly the Genius 4 rush to the scene.
 
(Source: Anime News Network)

In the story, the Great Era of Detectives — when detectives and thieves with a power known as "Toys" compete — has given way to the Great Era of Idols. However, someone starts stealing the idols' songs in Yokohama. When super idol Marine Amagi's hit song "Kiseki no Uta" (Miracle's Song) is stolen, she enlists the detectives of Milky Holmes. 
 
(Source: Anime News Network)

Third season of Tantei Opera Milky Holmes.

The Phantom Thief Arsène is undeniably powerful. If she wishes for it, she could steal any treasure she wants without being caught or arrested. However, she pulls her punches because she desires that Milky Holmes achieve their full potential as detectives—and then to battle them without holding anything back. To achieve this, she tries every trick up her sleeve to create various situations for them to face each other—avoiding any hindrances that may come her way!


In the story of the special, the members of Milky Holmes will investigate to return a stolen card that contains Aichi Sendou's memories.
 
(Source: Anime News Network)

Brand-new animation announced at "Live Milky Holmes Full Colour Festival."

Milky Holmes is a detective team composed of four girls who descended from famous detectives and possess supernatural powers known as "Toys". In this alternative world, instead of losing their Toys and becoming worthless students, they are on the path to becoming successful detectives. Under the guidance of Kobayashi Opera, they work to solve mysteries. 
(Source: AniDB)

A special program of Tantei Opera Milky Holmes produced by the staff of the TV series. 
After some pushing by Irene and her father and a lack of support otherwise, Kokoro stubbornly quits her job as a police detective to become an idol. She soon finds the idol life draining and starts to miss her old detective life. When Henriette notices Sherlock's loneliness without her, she stages a statue theft in order to convince Kokoro to return to the force. 
(Source: AniDB)

Cordelia Glauca