Still Lu Gonhu is so famous they even have a name for him he is supposed to be one of the most dangerous assasins in the world takimg on a group (of students I might add) should be easy for someone like him but well, here we are. About that I'll leave it for after we see how things develop in the arc. No one ever knows about who Tatsuya Shiba is and those who get close to the truth is only by guess work.
Actually it wasn't well represent but they were just annoued that he wouldn't make a move (admittedly also because Miki is lucky
) EVERYONE in that gym was trying to set them up
.
She treats Mikihiko like that because he is like one of her brothers since they grew up together (you can see this durong 9SC), while she does do things to blow off steam there are reasons she does what she does, she is more complex than what we are led to believe (not a spoiler you can see this in her actions), she treats Toshikazu like that because he is kind of a slacker and doesn't take things seriously (although when something catches his eye his get serious) especially when it comes to the family (Erika is very prideful about her family and what they do, also supposed to have been mentioned by her in this season), one of the reasons omitted by the anime is that she trained Leo because he wants to be in law enforcement and Erikas family trains all of them, so when she saw he had potential she snatched him up as her student (as any smart sensei would) and to her he is both her student and friend so anything romantic between them doesn't exist (as she herself said) and trust me she is a serious sensei. Her family circumstances are... interesting (let's leave it at that).
All throughout the season you can catch small details that you would normally dismiss as something trivial, like how she treats people, in fact if you she treats Mikihiko like a little brother and Leo like she treats Toshikazu (she treats them like that but acknowledges their skills). Sadly many things have been downplayed (for many of the characters) so the anime leaves a few things out (if you want I can send some of them in a message to you, if you want of course).
Pretty sure no ones noticed the rivalry between Erika and Miyuki.
Everything I mentioned is there throughout the season, all you have to do is connect the dots, there are less than the original source but they are there.
Nope that's just lazy animation, like in 9SC the crowd wasn't supposed to be full of students but the general public since that competition is supposed to be like the Olympics, people from all over coming to see them compete and the only students there would basically be those with familoes who are well connected, famous or have something to do with the 9SC itself (basically the clans). I expected the animation team to at least add some cars to the freeway or have people walking in the sudewalks, instead all we ever see are students or loke a handful of adults and no one else (which is creepy if you ask me).