YOU SAID:

I have a cat named Sean and he is such a good cat except when he is out of my room and interacting with my other cat twiggy, then he is a huge jerk

INTO JAPANESE

私はショーンという名前の猫を飼っています

BACK INTO ENGLISH

I have a cat named Sean

INTO JAPANESE

ショーンという猫がいます

BACK INTO ENGLISH

There is a cat named Sean

INTO JAPANESE

ショーンという猫がいます

BACK INTO ENGLISH

There is a cat named Sean