@SemiNoodle It's been a while since I read the earlier chapters, but wasn't Piglette trying to get in his pants as a social climbing/political power play? I have this nagging memory that her motives aren't entirely pure.
Gobuko, on the other hand, is pretty much the only girl in the harem who actually just wants Peter because she loves him and not for some ulterior motive. Orc and Elf girls want his seed to strengthen their tribe/family lines. Mithlim wants him to support her so she can just be lazy and not have to work. Luvelia loves him too, but she's not really "part" of the harem. More like... adjacent to it?
Also she's adorable and has abs, so that's a plus.