Bang is bings sister and Bing is bangs brother they are both like little kids but they are very old their skin is blue just like their color when they turn into guns bang literally has bangs in her hair and puffy and Bing just has normal hair Bing is less talkative and more cold but a little submissive boy but Bing is still more serious and stern while bang is more energetic and more troublesome she’s a rouge she’s got a little bit of thickness but they are both 150 years old