I think I broke my sister?

Ok. My family has 5 brothers including me and 1 sister. The boys ages are 17,16, me 15,13,and 5. My sister is 11. When i was 5 she was born. We used to be rlly nice to her until she started getting spoiled rotten. but she couldnt help it. When we were kids we were rlly mean to her. We scared her with bugs and she would scream as if she were being murdered. When she was 7 on her birthday. their was a serious tornado and we had to stay in our homes hallway. she was terrified.Now she checks the weather everyday in fear of tornados. She is stil afraid of the dark too and doesnt no how to ride a bike bcuz she is scared of everthing.She does eat ketchup because we would gross her out with it as kids and doesnt try any new things. She gets plain burgers at mcdonalds and hates condiments and stuff. Over the years she has gotten chubby (which is a little my dads fault). She has hairy arms for a girl, and her eyebrows are a little buishy and she grows a little unibrow, BUT its not her fault. She got unlucky genetics. We used to also scare her alot. BUT we were just kids. She now has ADHD and anxiety disorder. She is self concious of the way she walks and acts a little "weird" but i feel like its me and my brothers faults. She is going to middle school and will have to deal with this. She is chubby, has bush eyebrows if my mom doesnt wax them, is WAY TO TALL for her age,yellow teeth,hairy arms, and many fears. she's not ugly at all.ill help her with this through the summer tho. but i feel like me and my brothers damaged her personality.