Japanese TAs

So in my Japanese class there are these two TAs, I am not sure if they are considered TAs, they are students but like, they weren't forced to be there just asked if they wanted to. They are both from Japan and their names are Sae and Kasumi. These two are really helpful in my studies, as they are both from the country they can teach me things in and out of the classroom, they've helped me study for an exam and even taught me how to casually talk with people in Japanese, unlike the extremely formal speech we are currently learning as of now. They are really great people, and great friends, and they have both helped a lot to make this year better.