Do you think BY2' s sister is better or her sister is better?

Personally, I think my sister is a good girl with a lively personality. Although my sister is also very lively, she looks more mature and has to take care of more things than her sister. I think my sister is a good girl. Hehe, actually, my sister is very good, but not as good as my sister. Gnome male-",my sister always bullies my sister (just joking with each other). Personally, I prefer my sister because she is more mature. Please accept it if you are satisfied. Thank you, Gaga.