Void is known to be very dangerous all throughout hollownest, some would even call him a criminal for killing innocent bugs, but he does this to protect his brother echo. Echo is smaller than void, due to being flawed when created by the pale king, which is also why echo doesn't have his own weapon. Luckily, he was created at the same time as void, so he was taken away by void before he could be thrown into the abyss. Void and echo are often seen wandering around hollownest, but usually in the city of tears. void does what he can to protect his brother, and would risk his own life for him.