Penny is very sweet, bubbly and has an older sister personality to most people whom she's close too. Her older sister persona is often very reliable; being the voice of reason in conflicts involving any problem or scenario that's happening. She's very helpful, but sometimes tends to be a bit simple-minded. While she's normally seen as happy and cheery, she had a rough childhood regarding her parents. This caused her to become apologetic if she feels like she did something wrong.