Yuki Yuna is a Hero: The Washio Sumi Chapter Episode 2 English Subbed Episode Title:Friends.Episode Description:Half a month later, after the girls beat their second Vertex, they are sent on a training camp to build their teamwork. Later, Sumi and Sonoko follow Gin as she winds up helping a lot of strangers, when the third Vertex suddenly appears. As the girls manage to work together to defeat it, Sumi laments that, contrary to her own beliefs, she was the one faltering behind everyone and swears to become stronger.