My new cat Sombra

My new cat is totally the opposite of my cat Kira
Is black and has yellow eyes is very bad, and is always fighting with my cat.
As I had a cat and my brother a Chinchilla my sister bought another cat, but is very bad and very badly behaved. 
Bites all, and eats it all, apart from that always comes to sleep in my bed, and I do not like it. 
forgive him for he is small .. 
my cat Kira is better.