Terumi and Omi are the two girls, always together, who like to gossip, but in an innocent and playful way.
They're in class 1-1 and before lessons they're talking together. In chapter 1, they talk outside the school; in chapter 2 they talk in the corridor about Angelina, the fact that she invited Makio Sono to the tea club and about what will be my reaction; in chapter 3, they're in front of the baseball field and they talk about the boys and their matches.
They host the Tea Club, and they invite the player to come there after classes (" There's cake! ^-* ")