like I said, I haven't really analysed her that much. I remember watching an H3H3 video recently where she send Ethan a jar full of her own spit.
https://www.youtube.com/watch?v=dQscyzNOBNY
I thought that her behaviour could be linked to Si as vulnerable or surpressed ignoring function, which is linked to sexuality, meaning that types with weak Si (LIE, EIE, SEE and SLE) often display their sexuality openly, or are even prone to perversion, or they have an unhealthy or unorthodox approach to sexuality. I think it applies to belle delphine. from my own observation and various socionics sources it seems that SEE is the type that is most inclined to prostitution, but belle delphine seems to also be a rather strategic and creative person, making me lean more towards EIE (who have Ne as 4 dimensional function). just my 2 cents.