YOU SAID:

Riley is a good friend of mine who has a good attitude

INTO JAPANESE

ライリーは良い態度を持っている私の良い友達です

BACK INTO ENGLISH

Riley is my good friend who has a good attitude

INTO JAPANESE

ライリーは立派な態度を持っている私の良い友達です

BACK INTO ENGLISH

Riley is my good friend who has a good attitude