เธอ(ter)

you (informal; familiar)

informal second-person pronoun used with peers, close friends, or younger people; can sound intimate or casual.

she; her

third-person feminine pronoun meaning “she/her,” common in writing and some speech; also used as a neutral third person in songs or literature.

term of address (affectionate)

used vocatively between intimates or in romance-themed contexts, similar to addressing someone as “you, dear.”