@Hollow7F
The archer girl is an elf. The girl in the very last frame of this chapter is a human. It's true that they look very similar but there are differences and there is no reason to focus on her face like this other than because this new character is being stealthily introduced.
If you look at the top left frame you can also see her clothes and her build. I wouldn't say that her clothes fit a magic attacker and least of all a physical attacker. It's not quite the priest like garment most healers wear, but it seems close enough for me.
However, the main reason I am assuming she is a healer is simply because this party will certainly be facing the black mage and they will not stand a chance if they don't have some ways of countering his debuffs. A white mage can purify and buff them. The buffs are quite important outside of facing the black mage because they will no longer be fighting opponents weakened by the black mage. In order to keep progressing smoothly and not realize that their party actually became weaker from the black mage leaving they need someone to buff them enough to achieve similar results as when they were facing weakened opponents. In fact, since Remmé had a tendency to hide his power and only use his black magic when it was actually necessary and in a very subtle manner (like apparently helping the hero one shot the wolf boss), if a white mage gives party wide buffs they may very well perform better as a party.
And certainly, the warrior was being rude but honestly, you can't really blame him for looking down on Remmé. The generalized black mage stigma is bad enough, but all Remmé appears to be is the childhood friend of the hero who needs to be protected in battle and doesn't appear to do much of anything. Even when he asked Remmé to let him experience what he could do and prove his worth, Remmé refused. The reality is that if Remmé was always going to hold back and not show his full power then he was in fact impeding on their party's progress. Considering how highly he is evaluated by the ruler of all demons, I expect the hero party would have progressed much farther if he was actually doing more than the bare minimum in battle. It was always the rational decision to kick the black mage out and the warrior was the only one willing to push for it. There's no good way of kicking someone out of a party when the reason is that they don't seem to be pulling their weight in battle. Honestly, unless I see him acting like a dick in general, looking down on people, I'm going to assume that he's just very competitive and wants to achieve greater glory and riches. Well, the author will probably make sure he keeps a poor personality, but honestly his rudeness to Remmé can easily be explained by the resentment: he earned a spot in the hero party through hard work, while Remmé got in because he was a childhood friend of the hero and Remmé doesn't appear to do much in battle and instead requires to be protected. It's natural to be pissed off about that because it really seems like he's just putting in work for a leech.
