Only when written 己
Archaic first-person pronoun. Used in classical Japanese, especially in poetry and old narratives. Not used in modern speech.
In classical Japanese, 己 (な) expressed the first person, like われ.
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.
Old books contain phrases like "汝、何を為すや" meaning "What are you doing?"
Kana spelling for search convenience; the word is normally written with kanji in classical contexts.
Archaic second-person pronoun; the kanji 汝 is strongly associated with 'you' in classical Japanese.
The origin is uncertain. It appears in Old Japanese as a pronoun for both first and second person, but its derivation is unclear.