pronoun
Obsolete humble or formal first-person plural pronoun, used mainly in pre-modern written Japanese. Not used in modern conversation.
余輩はこの書を後世に残す所存なり。
We intend to leave this book for posterity.
From 余 (archaic first-person pronoun) + 輩 (group, fellows). The exact historical derivation is uncertain; it appears in classical texts as a humble plural.