I really despise characters like Inami in fiction. If the schtick was she hit Takanashi reflexively and then he hit her back and they got into fights all the time I might find it funny but with her just beating on him while he is encouraged by the entire cast to shut up and take it from her without complaint makes it less funny and more irritating. It also stretches the imagination that she hasn't managed to hit any male customers yet seems to almost go out of her way to him him.

Since I doubt she's going anywhere I can only hope they keep on the track of explaining away her violence as a coping mechanism for budding romantic feelings. That way I can try to savor the split second after she confesses to him and he rejects her with crushing finality but before she punches him through the roof while everyone laughs.