Making new friends helped her 'come out of her shell'. = Making new friends 'brought her out of her shell'.
He lost confidence in himself and 'retreated/withdrew into his shell'.
The police found several spent 'shells' at the scene of the shooting.
(..) Without the bell, my family starves! I beg you! Please take a Rastafarian Munion! ROGER LAUGHS Oh! Jesse, this is it! I'm coming out of my shell! My bell! Oh! BELL RINGS You know what? I don't even care. I've escaped my old life (..)2019 TvShow: American Dad! Title: One-Woman Swole Season: 13 Episode 14