Korean Pronoun part 1; I, you, me, our, my, yours...


The use of pronoun can be omitted when not needed if the the listener is clear about who or what is being refered to in a sentenced for example, A can ask B "밥을 먹었어요?" (You've eaten?) and clearly the question is about B; the listener. In return, B can reply a plain "네, 먹었어요." (Yes, I have eaten.) without ever using '저' too, as it remains clear in this conversation that the subject is B.
 English한국어
Casual/IntimatePolite
1st personI*Korean has no true third person pronoun and instead use this/that/these/those with a noun (e.g. man, woman, thing, people and so on) to refer to the third person) E.g. : 그녀, 그 사람, 그 남자, 그 여자, 그 분.
2nd personyou당신
1st personus우리우리
3rd personshe/he/that person그분
3rd personthey그들그들  
Possesive pronoun
1st personmy/mine나의 (shortened: 내)저의 (shortened: 제)
2nd personyour (singular)너의 (shortened:네 pronounced as 니)당신의
2nd personyour (plural)너희당신들의-의 suffix  indicates possesion
2nd personour우리/우리의우리/우리의-들 suffix indicates plurarity
3rd personhis/her그의그분의 
3rd persontheir그들의 그들의 
The use of '우리' although means 'our' or 'us', its is always used in replace of 'my' to appear humble e.g. 우리 남편, 우리 아보지, 우리 누나.  It may sound strange for Westerners but this is actually a common practise in Asia.  In fact to refer person as '우리 (name)' is considered a sign of endearment towards that person.
 
Most times 2nd and 3rd person use titles and names.  This is because refering to another '당신' is too direct and considered impolite and rather is only reserved to emphasis a point.  However in the casual manner, using '너' is acceptable if two persons are very close or refering to a much younger person.  A more respectful way is to refer the 2nd or 3rd person with their titles and names with suffix -씨. Examples below: -
mom

엄마
-님 is an honorific suffix for titles
dad아빠-씨 is a respecful suffix for names (both male and females) 
mother 어머니
father아버지
older brother형(called by a male), 어빠(called by a female)
older sister누나(called by a male), 언니(called by a female)
dear (married)여보
son아들
daugther
senior선배
junior후배/막내
boss사장님
teacher선생님
professor교수님
older woman아주마
older man/mister아저시
customer손님
driver기사님
Ji Won (name)지원씨
Min Ha (name)민하씨