Ritsu was great when she was first introduced, but as I go on with the series, she seems to be a little less useless every time I see her, and then in the past few chapters, she was just gone. Is she truly a great help? When they went to that one place to make a major Assassination attempt, I noticed that Ritsu didn't take part at all. So what I'm asking: is she a necessary component of the class?
closed as primarily opinion-based by ton.yeung, Maroon, Dimitri mx♦, Torisuda, Logan M Feb 11 '16 at 3:36
Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.
Bear in mind that there are a lot of students in E-class, and as such the author has the tendency to rotate characters in and out of focus. Ritsu has her moments in, for example, the Assassination Island Arc and the God of Death Arc (not gonna discuss in depth to keep the answer spoiler free.) The only students that have more of a consistent focus are Nagisa and Karma.
To answer your question, her necessity as a component of E-class is more or less equal to any other supporting character, for example Ryouma Terasaka.