The thing about Melody is she looks pretty and I'd hit it, but she doesn't have that X-factor or special something to her looks that D has.
For me the two characters showing the most vulnerability with MC have been D and Jennifer. I have hopes both Georgina and Elena will yet to have those moments in DMD. Without vulnerability for me you don’t get to an X-factor in a romance VN.
D then has had much more screen time and thus much more vulnerable moments. D is much more womanly and this will attract differently than Jennifer; but if Jennifer had the same screen time, some might find Jenniffer with the bigger x-factor imo.
Without seeing Melody “in motion” she has two differences with D that may make one’s reaction to her different from the position as a male (or at least two that make me react differently): (1) D is considerably shorter than Melody (for me it make a vulnerability difference); and (2) D has a rounder face than Melody (for me it makes a femininity difference).
I am hopeful that, once we see Melody “in motion,” most will get X-factor out of the (hopefully) complexity of facial and body actions and reactions in her social intercourse with the MC and others. She has vulnerabilities that I can’t describe, because, although scripted, I don’t know how they will ultimately play out on the screen.
I’m hoping she will have a balance of strength and weakness in her that could be likened to a cross between Holly Golightly and Hermione Granger, but who knows until all the elements come together and it gets played out in the first 2-3 releases as the character unfolds.
(Meanwhile D of DMD for me probably will still hold the bigger X-factor for me as her height and body type - and her height difference with MC - matches that of my own lady of 20 years - who, btw, is 2 years older than me. So when I see D from MC’s view, I get echos of my own lady looking up at me. Oh yes, and my lady has a similarly round face.)