Shuichi Akai/Relationships

Tsutomu Akai
Tsutomu is Shuichi's Father his disappearance drove Shuichi to seek revenge and driven him to Join FBI to find out the responsible for his disappearance.

Mary Sera
Mary is Shuichi's mother, who have also turned small by eating the poison APTX 4869.

Shukichi Haneda
Shuichi's younger brother, who has an extraordinary memory.

Masumi Sera
Shuichi's younger sister, who now goes to Teitan High School.

Shinichi Kudo/Conan Edogawa
Shuichi currently resides at the Kudo residence under the identity of Subaru Okiya. The two originally met at the beach 10 years prior to solve a case involving a watch store robbery. The two share a love for the Sherlock Holmes series and are adept as detectives. They are currently opposing the same foe, the Black Organization.

Akemi Miyano
Shuichi's former girlfriend and the late elder sister of Ai Haibara / Shiho Miyano.

Ai Haibara
Shuichi is protecting Ai in secret, but she doesn't know it. As a promise to Akemi, Shuichi has vowed to keep the shrunken Shiho safe from the Black Organization and any other threats that might harm her.

Rei Furuya
Since joining the Black Organization, Rei Furuya has always considered Shuichi as a worthy rival, he wants to compare his capacity with Shuichi and thinks he is the only one who could defeat Shuichi. Shuichi always shows respect towards Rei, he admits Rei's capability and feels interest everytime he faces Rei, he also makes Rei feel quite confused sometimes. Their relationship is becoming more bitter and dramatic when Rei misunderstood Shuichi killed his best friend - Scotch, but actually the one who indirectly caused Scotch to die was Rei himself. Shuichi chooses to keep a secret, continues to let Rei misunderstand him instead of letting Rei know that painful truth. Over time, Shuichi appears to help and protect Rei in some cases, he gradually wants to compensate for the losses which Rei has experienced, he also reveals that he doesn't want to be Rei's enemy. For now, Rei is temporarily lowering his hatred to working well with Shuichi and Conan in destroying the Black Organization.