A limited express train that inherited genes from the 0 series. A 2-car set primarily used for the Tsubaki and Asakaze limited express services. A boy who is always energetic. His favorite food is beef bowls from Yasuko-ya.

A limited express train introduced to replace the 119-6000 series. Primarily used for the Yamakaze limited express. A quiet girl who wears glasses. Her favorite food is shortcake.

The younger sister of the 2500 series. A dedicated train for group tours with various luxurious facilities. The other trains of Obakyu Railway call her Fu-chan, except for the 2500 series. Her favorite food is ice cream.

The diesel multiple unit version of the OB778 series. Primarily runs on the Higane Line for the Hoshimi limited express. He is friends with the BEC2000 series. A boy who is said to be quite handsome. His favorite drink is Ramune.

The OB778 series in Tsubaki limited express livery. Usually runs in a 3-car formation. Primarily assigned to Tsubaki services (sometimes coupled to form a 6-car train). A brave girl. Her favorite food is pickled plums.

The multi-purpose version of the OB778 series. A 3-car formation used for various services like Tsubaki and Yamakaze (also occasionally coupled into 6-car sets). A boy who is reportedly quite mischievous. His favorite food is Yakiniku.

The older sister. A vehicle intended for the Obakyu Cross-Express. Also a 3-car formation. Often operates as a 6-car set by coupling with the Tsubaki or Multi-purpose types. She is tall. Her favorite food is macarons.

The younger sister. A vehicle with the updated Obakyu Cross-Express livery. Also a 3-car formation that sometimes couples into 6-car sets. She is also tall, though 5cm shorter than her sister. They get along well. Her favorite drink is tapioca milk tea.

The 4-car general-purpose version of the OB778 series. A big brother figure. Used for various services including Yamakaze and Tsubaki. A tall, handsome boy who wears glasses. His favorite food is consommé soup.