Etsuko Murakami

Mitsu Higashi High School, 2nd year. When she was a child, she was called 'Etsu-nee' because of her bossy, big-sister personality. She tends to give up easily, thinking that no matter how hard she tries, it's pointless. However, after getting dragged into things by the transfer student, Riina, she reluctantly joins the rowing club along with Hime.

(Source: Official site, translated)