They are Riki
's four older siblings. One of which is female, the other three are males.
Ginga Densetsu Riki
When Takeda Gohei visited their home, he looked over each pup (ignoring Riki) to take with him to train. He took the white one and left the rest with Yamabuki.
- It is unknown if any of Riki's siblings are alive or not.