@Massmada265: I agree with you and others on this new character (I can't remember her name, I'll call her "Flatchest"). I also predict that she's going to do exactly what someone else predicted: Flatchest's likely to have developed "feelings" for (what she perceives as) her little chew toy, and will--eventually create competition in herself with Finne. (Those feelings are likely intensified possessiveness toward a prey item.) Completely unnecessary, just as her gung-ho alliance with Arnold proves detrimental to his plans. At least Finne had the conscience and self-awareness to realize when she was inconveniencing Arnold; otherwise, she hopes and tries to be of service to him. Flatchest? She
couldn't give a damn less, and you can tell her "aid" is self-serving because Arnold doesn't have a say in whether he receives it or not--just as he never did since his childhood.
And consider the effects of Flatchest's "aid" since then: he's
still physically weak. Finne's aid, though almost always incompetent, is constructive in nature; Flatchest's, on the other hand and with all her competence, is destructive. The wall-suckers in this comment section are too busy lusting for a good taste of washboard to realize that a direct connection was immediately drawn between Arnold's childhood experiences with Flatchest and her current "volunteering" of her support: both are ostensibly useful, but actually unwanted, unnecessary (as Arnold himself said), and potentially detrimental. In the present, he may be physically weak, but--through his magic--he's one of of the strongest in the setting, and does not need Flatchest's help--definitely not the way she's throwing it in his face. The way she is, she stands to do much more harm than she intended, and--given the nature of his MO and their relative standings in peerage--his hands are tied, and he can do little to nothing to stop her.
In addition, the words of
@icekatze are right on the money. At best, it's an instance of the tyranny of good intentions; at worst, it's exactly the bullying suggested. Either way, it's still viciously aggressive, self-centered behavior.
That said, and regarding the responses you got, I do think you've missed one key factor in all of this: The majority of denizens of MangaDex appear to generally favor aggressive, masculine (in demeanor and physique) characters like Flatchest; they also appear, at the same time, to not only dislike but detest girls who embody traditionally feminine characteristics, along with traits historically and traditionally considered beautiful in women.
@XNovalX: Don't let these people tell you you do not have the right to voice your dislike of this new girl, or any other character like her. What you did is
less than what they do in stories where the main girl is more like Finne, and the romantic competition is like Flatchest, and no one censures or castigates them the way they are you and people who think as you do. No one tells them that it's just a story, and that they shouldn't get so worked up over it. No one tells them to read another manga if they don't like the FMC. I know this well because their kind are doing this to a series I'd waited years to see scanlated; there's no place to discuss it (on MD, at least) because the comment sections are filled with people just like these who hate traditionally attractive girls (like the FMC of the aforementioned manga series, who is actually romantically involved with the MC from the start) in favor of
clearly vicious side character females (all of whom either know the MC's in a relationship or--even worse--know exactly whom he's in a relationship with, and still want to get in the way).
If there's one thing I've seen over the years, it's that though a harem might be a man's fantasy, mangaka after mangaka has made the concept something to revile through characters like Flatchest. I genuinely hope that this story does not become one.