YOU SAID:

casey has no brain power in her head

INTO JAPANESE

ケーシーは頭の中に脳力がありません

BACK INTO ENGLISH

casey has no brain power in his head

INTO JAPANESE

ケーシーの頭には脳力がない

BACK INTO ENGLISH

Casey has no brain power in his head

INTO JAPANESE

ケイシーの頭には脳力がありません

BACK INTO ENGLISH

Casey has no brain power in his head