It’s interesting how the author removed the healer girl whom I thought was the main love interest out of the picture and introduced this high-school girl out of the blue in the very same chapter. It's also interesting on how the author is putting a lot of focus on the new girl after just introducing her. She's getting quite a bit of panel time for a new character. From what I can see it's obvious she's not just some random side character, she’s most likely going to be significant to the main story some way or another. The question is how? My first guess which is the most obvious guess, is that she's the MC's new squeeze. However, if she aint hooking up with the MC the only logical relationship they could possibly have is a master and student one. The reason I think she might become his future apprentice is, 1. her age and 2. her rank. She’s young and a totally noob the perfect candidate for an op MC to teach. I predict that after a few more raids she gonna start admiring the MC hard and those feelings of admiration will be the spark that jump-starts their relationship. Hell, I wouldn't be surprised if she just straight up ask the MC to train her with sparkles in her eyes.