A train operating on the Sobu Line since 2000. Belongs to the Mitaka Rolling Stock Center; this is the B27 set. Playful, and wishes Chiba Station would get departure melodies.

A train operating on the Sobu Line since 2000. Belongs to the Mitaka Rolling Stock Center; this is the B12 set. Cool and composed.

Introduced in 2002, this train transferred from the Yamanote Line to the Sobu Line. Belongs to the Mitaka Rolling Stock Center; this is the A551 set. The straight man/comic foil.

Introduced in 2015, this train transferred from the Yamanote Line to the Sobu Line. Belongs to the Mitaka Rolling Stock Center; this is the B31 set. Loves sweets.