User blog comment:HavokandSerenity/Weiss x Neptune Shipping name?/@comment-4010415-20150624212420/@comment-25555436-20150625161747

Well Bumblebee only makes sense now. Back when it began it existed only for the sake of shipping, it was impossible and ilogical because Blake and Yang had never said anything to each other.

Heck, the scene where Yang and Blake became partners was their only interaction with each other for the entire Vol.1 and half of Vol.2. Black Sun is the one that did make sense, despite being younger.