pronoun
Only when written 己
Archaic first-person pronoun. Used in classical Japanese, especially in poetry and old narratives. Not used in modern speech.
古語では「な」は「われ」と同じく一人称を表した。
In classical Japanese, な expressed the first person, like われ.
pronoun
Only when written 汝
Archaic second-person pronoun. Found in classical texts, often with a familiar or sometimes derogatory tone. The kanji 汝 is typical for this sense.
「己、何を為すや」と古書にある。
Old books contain phrases like "己、何を為すや" meaning "What are you doing?"
The origin is uncertain. It appears in Old Japanese as a pronoun for both first and second person, but its derivation is unclear.