Stranger

『STRANGER』 \ˈstrān-jər\

noun

: someone who you have not met before or do not know
: someone who has not experienced something
: someone who is in a new and unfamiliar place
: s̶o̶m̶e̶o̶n̶e̶ y̶o̶u̶'̶v̶e̶ m̶e̶t̶ f̶r̶o̶m̶ t̶h̶e̶ p̶a̶s̶t̶

Example:

❝I love you, but who are you?❞