You, me, him/her, it, who, this, that... etc. are synonymous.
There is a distinction between "honorific language" and "self-effacing language" in Korean, so it is not rude to use the corresponding pronouns in appropriate occasions.
Here we will introduce the relevant usage of "you, me, he/she, who" in Korean.
<h1 class="pgc-h-arrow-right" data-track="5": >我:me/me,magnetic</h1>
저: Use in humble language, in conversation with elders, or in polite situations.
나: Generally used for peers, juniors, and people close to each other.
자기The meaning of "self".
Self Introduction = 자기소개【Self Introduction】
Sometimes couples in love will also call each other "자기".
* Use of auxiliary words
The following is a table combined with commonly used auxiliary words.
<h1 class="pgc-h-arrow-right" data-track="25">:you/you/you</h1>
당신 [When]: Use when honoring each other.
그대: Often appears in the lyrics, rarely in general occasions, similar to the English "thou".
너: Generally used for peers, juniors, and people close to each other.
<h1 class="pgc-h-arrow-right" data-track="47" > him/her, who</h1>
그: He, literally translated as "that (man)"
그녀: She, where "녀" means "female", literally translated as "that woman".
Who: 谁。