The Takamachi (高町) family is originally from the Uminari City, Earth, but its youngest members reside in Mid-Childa, as of ViVid. It was first introduced in Triangle Heart 3 and, consequentially, in Magical Girl Lyrical Nanoha.
In Triangle Heart 3, the Takamachi family is revealed to have descended from the well-established samurai clan Fuwa. In fact, Shirō Takamachi's surname at birth was Fuwa, but he changed it when he married Momoko Takamachi, presumably to throw the many enemies he has made in bodyguard business off his trail.
- Shirō Takamachi (born in 0028, formal head of the family)
- Momoko Takamachi (born in 0032, Shirō's wife)
Shirō's children (in order of seniority):
- Kyōya Takamachi (born out of wedlock to Shirō's paramour Kaori in 0046)
- Miyuki Takamachi (born in 0048, adopted, originally Kyōya's cousin)
- Nanoha Takamachi (born in 0056 to Momoko)