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 now lives at Shinichi's house as the identity of Subaru Okiya.

Akemi Miyano(deceased)
Used to be Shuichi's girlfriend, sister of Ai Haibara / Shiho Miyano.

Ai Haibara
Shuichi is protecting Ai in secret, but she doesn't know it.

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.