I'm telling you for your own good,
And not because I'm-
There is a part that the statement is cut off, and at that time, she looked ashamed or those kind of stuffs. She is very skillful and technical in fight, which means her strength itself is not really high. And in the 'sworn to the sword', pearl put herself into a extreme situation to fight, even though the thing was not bearable to her. I think Steven's reaction towards the Sugilite remind her of the struggles she had.
