Here we have Nike a cute bully-able heroine. Soredemo Sekai wa Utsukushii is a weird series, originally a shoujo, it was adapted by a fellow bro or sis with refined tastes.
Basically it is a shoujo almost josei title adapted by an obviously shounen team. It is great! if anything the only thing that bothers me is the Male MC being a disgusting shota. But it just pushes it deeper into my mind that probably the correct demographic for it is josei rather than shoujo.
Anyway! Compared to the manga Nike is bustier and more womanly following more conventional shounen paradigms. So in essence we have a josei manga masquerading as shonen masquerading as shojo.
The point being that contrary with shoujo where things are flowery, josei more commonly have asshole male leads who abuse and tease the female leads. So Nike is cute, busty due to the animation and extremely bullyable. In few words, Nike simply stimulates my sadist side a bit.
Personality wise Nike falls in the tsundere spectrum but very close to the deredere part.
Works fine with <lora:Nike_LemercierV1:0.7> nike_lemercier,
Outfit wise i only isolated her pink dress:
pink_short_dress_high_collar
Her other dresses and hairstyles are within the dataset but are not prolific enough to explicitly train. While Nike looks cute in those they at most appear during a quarter of an episode.
Sadly no dataset for you it is just trained from screencaps as there is almost no fanart. So I will only attach the tag summary so people can experiment.