That's an incredible magnificent work, WM Cheng, I wish I could such a good work like you (Theoreticaly, I knew a lot of thing about modelling, but, because of my studies at university, I haven't much time to built model kits, so that I didn"t practice for a long time) !
For the supposed Mave "Missiles", they aren't missiles but fuel tankers only !
I've downloaded the episode 2 of Yukikaze, in which the MAVE Yukikaze and the TS-X1 (AI-Controlled MAVE) appear, they seem to be cobalt blue (or something like this).
When the both Mave are under attacked during a test flight, we can see them ejecting their fuel tankers before engaging JAMs attack units.
I'll try to get some pictures of to clear off any misunderstandings about the colour of it.
See ya !