Talk:Nana Ebina/@comment-94.197.121.116-20160114230907/@comment-24801697-20160114234027

In Japanese culture, it's typically rude to address someone by their first name without their permission, or unless they're dating. Usually, addressing someone by their first name is a sign that you're interested in them, either in pursuing an intimate relationship or you're real good buddies. How ever, addressing someone by their last name also shows a great sign of respect to that individual & their family name.

There's probably more to it and I've barely just scratched the surface, but most likely it's because since Taihai is older, he addresses her by her last name to be formal, so Taihai is "senpai" to Ebina, and Ebina is "kowhai" to Taihai. Senpai just means upper-classman and kowhai means under-classman. I'm probably spelling kowhai incorrectly by the way, I'm too lazy to google search, and what I've spoken about probably has nothing to do with why every one addresses Ebina by her last name rather than her first, might have to read the manga or something to understand it.