Family relationships

Youngest to oldest: Shizuku, Mikage, Luka, Machi, Yumi, Luka, Hikaru, Shiki, Shino, Natsu, Yuka, Chizuru, Kaito, Takashi

Half Bothers: Shiki & Shino (middle brother) (9 months apart Shino) Kaito: (half older brother to Shiki same mother)

Sibling group 1: Hikaru, Laito & Luka (parents: deceased)

Sibling group 2: Mikage & Chizuru ( parents: deceased)

Sibling group 3: Shino & Shizuku (half sibling)

Sibling group 3: Kaito & Natsu (same father: deceased)

Father and Sons: Takashi (father) Shiki & Shino (mother of Shiki & Kaito deceased)

Sisters: Yumi, Yuka & Machi (Shizuku: half sister, same father)

Mother & Daughter: Chizuru & Shizuku (father: left)

Shiki and Shino are both half brothers and Kaito is Shiki's half older brother and Takashi is the father of Shiki and Shino. Kaito's father is dead. Hikaru, Laito and Luka are siblings parents died. Mikage and Chizuru are siblings and Mikage is Shizuku's uncle. Parents are deceased. Shino and Shizuku had the same father but he left them once Shizuku was born (hint, hint: the curse) Yuki, Yuka and Machi had the same parents but they died once Shizuku was born. Mother left before Machi turned 6. Long story short their all cousins and related to each other. Each and every one of them are apart of the Chinese Zodiac and are distant Realtives of the Sohma family.