it started when I started to draw Ginny's head and thinking about her design I have no idea how was that born But then I just wanted to draw Luna,and I couldn't not to draw Neville after I drew LunaI'm not satisfied with his design though. anyway,the silver trio,hope you'll like<3
Given that silver is associated with Slytherin, I'd go for fancy-shade-of-red trio, through that doesn't sound nearly as cool, but yeah, they would be.
I just want to say I adore your vision of Ginny and Luna. Both of them have an adorable "rough diamond" look about them that is so in character and so very realistic and beautiful. Great job!