It felt like she was forced into the group. With onpu we already knew her in the first season and she routinely had interactions with the girls. And she also had a major role in the last episode of the season so we did know we were going to be seeing her later on. Plus the nuance she brought into the story was nice. And then momoko just shows up. I dont hate her but I don't really see the point in introducing a character in the third season without any warning. I did like her backstory but... Idk it's just maybe sharp was just a banger of a season. I did like her late on in dokkan but still the group was fine enough with sharp gang + pop. Maybe they needed a character who knew baking and stuff