Another sexy girl comes to Minerva's forest and all the attention shifts from her to this new girl. Minerva continuously tries to outdo her with extravagant outfits, being scantilly clad and flirtatious but this new girl is so effortlessly sexy that Minerva can't compete. So then Minerva starts actively trying to sabatage this new girl, Covering her in garbage, or make her look like she's got acne or something but somehow all of her plans backfire. Eventually she gives up all pretense and just tries to kill the new girl, which obviously backfires tremendously (it's worth noting that as she does all these things she's gradually becoming more monstorous and messy looking.) At the end Minerva's caused herself so much misery that when she walks out the new girl thinks she's a swamp monster or something and runs off, so now minerva is proud to once again being the only beautiful girl in the forest. Of course she looks so hideous now that nobody really flocks to her anymore.
I think the most important aspect of Minerva is she's kind of a shitty vain asshole so giving her some sorta comeuppance for that is the best outcome.