pronoun
Familiar second-person pronoun, often used by males toward equals or juniors. Can sound condescending or intimate depending on context. Not used toward superiors.
君、ちょっと手伝ってくれない？
Hey, can you help me out a bit?
君の意見を聞かせてほしい。
I'd like to hear your opinion.
pronoun
Only when written 君
Obsolete polite third-person pronoun, restricted to the kanji 君. Used in classical Japanese to refer to someone respectfully.
君は遠くへ旅立たれた。
He/She departed on a long journey. (archaic polite)
Rarely used kanji form.
Originally a noun meaning 'lord' or 'sovereign'. The shift to a second-person pronoun likely came from respectful address toward superiors, later generalized to familiar 'you'.