Klara did miss Peter, a lot. He had been one of her best friends, and her significant other (you'd never get her to say boyfriend, even in her head). His loss was particularly painful. And her father. Here, was Coulson.
So she knew who sat down next to her without asking. "It is a lovely day, Mister Fury, and perfect for ice cream." Her smile was sweet, but it didn't touch her eyes.