I found this anime when I was either in elementary or Jr High and didn’t think much about it, but when I rewatched it in high school some moments are just kind of cringe. Doesn’t change the fact that it’s one of my favorites and I’ll never forget it.
I just love that in assassination classroom nagisa's biggest inspiration is koro sensei despite not wanting to destroy / or having the power capacity to destroy the world he challenged his students to kill him and gave them the same end of the school year deadline I wonder how the next gen students would do would it be easier because of nagisa being human and the students haven't yet / don't have a problem doing it because the first generation all seemed to have some kind of hesitance didn't seem like they were truly delinquents except for the boys in the first episode who were willing to hurt/kill nagisa to get the money and some opted to save koro sensei or harder because of him having the experience of being trained by two ace assassins it really sets in that if they did another season without the training from karasuma or bitch sensei would the students be able to take on and seriously hurt/kill nagisa and where as the students seem to have nagisa's blood lust they seem to be to impulsive and don't strategies and it is like the class is just a class filled with karma akabanes and the part in the end where nagisa has koro sensei's log book in the end kind of implies the student has become the teacher and koro sensei's spirit lives through nagisa. Nagisa always seemed to stratagise everything leaving him the smartest in class but the next gent do have the spirit but lack the patients, know how and ability to actually pull it off sorry I ranted ther just something I find interesting. this song and the clips put together kind of gives me the impression he is telling his students about his experience in e class and was pretty much hired to be a part time assassin with the rest of his class mates
Another Comment summed it up. Karma (red-headed) got the power, intelligence and strength. Nagisa (blue-haired) is smarter (my opinion) and is just the born killer. I don't know what your girlfriend mens by this. Maybe you should ask her instead of strangers on the internet.