The eldest son. The flagship train of Oba Express Railway, sporting a blue stripe. His favorite food is sushi.

The second son. Unlike the 0 series, this train wears a red stripe. His hobby is visiting Takanori Myojin Shrine. His favorite station is Kida Station.

The third son. Due to a revision in the Series 001 design concept, his structure has been partially modified. (Omitted from Wiki) His favorite drink is Cola.

The fourth son. Added in 2009 to handle long-distance transport. He can couple with other Series 001-1200s and certain Series 2000 cars, and he's always on great terms with the Series 2000s. His favorite drink is green tea.

Series 001-6000. The fifth son. Introduced for long-distance transport like the 1200 series. He uses overseas equipment, providing a comfortable ride. He wears glasses and has a refined, young-master vibe. His favorite drink is black tea.

Converted from the 0 series (certain sets) in 2011 and introduced to the Imon Line. Since he was modified from the 0 series, they are relatives (also an eldest son). He is best friends with the Series 2000 Imon cars. His favorite food is grilled Pacific saury.

The eldest daughter. Introduced based on the 0 series design after a 17-year gap. Her relationship with the 0 series is... well, they seem to get along. Her favorite drink is orange juice.

The youngest child and the younger sister of the 1500 series. She is doted on by the Series 001 brothers and other Oba Express Railway trains. She and her sister sometimes have a Yuri-like vibe (they are just very close). Her favorite drink is apple juice.