So in Korean it’s oppa, can be used for older male that isn’t related to you and yes, can be romantic. As for her getting adopted, it’s more because of her talent than anything. She’s treated well because of her talent, but that doesn’t mean she’s treated like family. Pretty sure everyone knows who her real family is (another high ranking family that focuses on magic, not sword)
So in Korean it’s oppa, can be used for older male that isn’t related to you and yes, can be romantic. As for her getting adopted, it’s more because of her talent than anything. She’s treated well because of her talent, but that doesn’t mean she’s treated like family. Pretty sure everyone knows who her real family is (another high ranking family that focuses on magic, not sword)