For context, I have a character who is a Valkyrie. She became a Valkyrie in the 19th century, and still speaks in an old fashioned victorian way. Basically, at a future point in the comic, she will briefly mention her sexuality, and mention that she likes girls. (I am planning for her to get into a relationship later on). Would it be OK for her to refer to herself as Sapphic, or is that term considered derogatory? I'm a straight ally to the LGBTQIA+ community, and I don't want to use a discriminatory term. Thanks in advance!
Edit: I know different people have different views on different terms, but I'm asking as a rule of thumb.