I'm having some trouble figuring out some of the phrases that seem kind of idiomatic/slang, or that I can't really pin down the meaning to where I really understand what they are trying to say.

Emma is supposed to be a 2nd year while the others are 1st years. The official site seems to say they haven't decided yet whether to make a figure kit of her. As you can probably tell from the uniform, she goes to the same school as Ritsuka.