She likes to wear such armor. It is great for her. But she never have met king Sombra in Equestria.
Also she was born as an alicorn. Her wings became such because of fears, real nighly nightmares when she was filly, and depression
Story: she tries to find herself and become free from a lot of different fears and depression.
She tries to control herself from anger, sadness, hates, but it become more and more harder to control it.
She knows, that she can become a monster, but she doesnt want and afraid of it.
She also tries to be kind for everybody and keep always kindness
Lost believe in wonders and everything make her weak and even apathetic in Equestria in front on villains
But she has a hope, that she will find herself and shows good power everypony in future