User blog comment:Jopjopjop/High School DxD BorN episode 3 review/@comment-3965848-20150419062225/@comment-25792629-20150419173957

Vali's wings are highly speculated to be of inspiration of Lancelot Albion's Energy wings from Code Geass (Source: Divine Dividing Trivia) mostly because of the shear heavy resemblence. In my opinion, I found it weird how Divine Dividing's Sacred gear is "Dragon wings" but Boost Gear's Sacred gear is "A Dragon's Arm,"

In fact, to go on furthermore, I disliked this originally because I thought it was kind of unfair on Issei because Vali had unlocked his Sacred gear's flight early on, I know Issei has his Devil wings, but man, it would've been so badass just to see Issei with his Dragon wings while still in his human-appearance, he would've looked just as cool as Vali does when he does the same.

One thing I don't understand, though, is the fact Vali's wings are more like... energy-beams connected to a wire if you catch my drift, while Issei's wings are extremely dragon-like, also how Vali's wings has his scale male's Primary and secondary colours while Issei only has the primary and a new kind of tattered-greyish-fleshy secondary, I think he looks awesome regardless but I was actually expecting red & green dragon wings to match his Scale male, just like how Vali's do.