>>2828092Unlocking girls is random. If you want Patty then you just have to save up stones and wait for a banner that has her on it to throw stones at.
Preferably this banner should be a 3.3% SSR rate with only 3 girls on it, but those are very uncommon. Throwing stones at banners with tons of girls on them hoping to get a specific girl isn't the best idea, but sometimes it's the only option.
