Shinichi Kudo/Relationships

Hiroshi Agasa
Although not related by blood, there is a strong family-like bond between Shinichi and Hiroshi Agasa. Agasa was the first to know about Shinichi's shrunk predicament and was the one to tell him to keep it a secret. Most of the gadgets that Shinichi has were made by Agasa to help Shinichi catch the criminals and solve the cases as Conan.

Ai Haibara/Shiho Miyano
A mysterious girl who had transferred to his class in Teitan Elementary, Shinichi/Conan was initially shocked that she was the one who developed the drug that shrunk him. Despite mistrusting her at first, he soon found out that she had betrayed the Organization following her sister's murder at the hands of Gin. The two are fellow victims of the poison's shrinking side effect. Due to being the one who developed the drug, Ai/Shiho is one of the few people who are aware of Conan's true adentity.

Heiji Hattori
A rival detective from Osaka, Heiji originally sought Shinichi out to determine which of the two was a better high school detective. He found out about Shinichi/Conan's secret during A Sherlock Holmes Quiz competition. Occasionally, he would accidentally call Conan by his real name in front of Ran and others, much to Shinichi's annoyance.

Ran Mouri
Ran Mouri is Shinichi's childhood friend and canonical love interest. They have been friends and playmates since kindergarten, though Shinichi's tendency to drag Ran along into minor trouble caused some censure from her mother. Shinichi has liked Ran since they were little

Kazuha Toyama
A girl from Osaka and Heiji's love interest, Kazuha sees Shinichi's true form at the school festival at Teitan High School when Shinichi was solving a poisoning case.

Kaitou Kid
An elusive phantom thief who sought out a big jewel. Shinichi first meets the original Kaitou Kid when he and Ran were investigating the rumor at Teitan Elementary's library 10 years prior. The gentlemanly thief referred to himself as Shinichi's younger brother and sent him on a scavenger hunt which was originally meant for Yusaku Kudo. Shinichi later meets the second Kaitou Kid during a Clock tower heist some time before getting involved with the Black Organization.