一いち番ばん弟で子し

noun

best pupil; top disciple

Refers to the most skilled or favored student under a master, often in traditional arts, crafts, or martial disciplines.

• 彼かれは師し匠しょうの一いち番ばん弟で子しとして認みとめられている。

  He is recognized as the master's top disciple.