Celistia Ralgris, from the light novel Saijaku Muhai no Bahamut adapted to a 12 episodes anime.

There's little fan-art from her, so again the anime is the main source for the training complemented with some illustrations from the LN. She joins relatively late to the usual large harem cast, which means that -with the exception of her academy uniform- her other two outfits are quite lacking on data.

Trained on NAI. Recommended weight of 0.7-0.8

Trigger for all her versions: celestiara

Academy Uniform

hairband, ascot, capelet, shirt, center frills, underbust, belt, pleated skirt, (tailcoat:1.3), black thighhighs, knee boots, lace-up boots

READ NOTES BELOW

Pilot Suit

hairband, leotard, elbow gloves, belt, panties, thigh boots

Negative: cleavage

Swimsuit

hairband, blue one-piece swimsuit, see-through

• I'm going to have nightmare with that tailcoat?/skirt extension?/whatever of her Academy Uniform. It's not visible in most of the shots in the anime, and her uniform is the only one actually including it in that form...so, under-trained. If you want it to be visible play with the weight for the "tailcoat" helper tag, which I included by default at 1.3

• SD seems convinced that the white piece in her pilot suit is a cleavage cutout...not sure if a bug or a feature. If you want it gone, add "cleavage" to the negatives

• As usual, leave the footwear related tags out if you want an upper body generation, specially for the academy uniform

• Her LN version has green eyes (not blue) and wears a red ascot (instead of blue). You may need to reinforce "blue eyes" and "blue ascot" depending of your model/prompt.