When I recently discovered this character from Spy Kyoshitsu, (Spy Classroom) which finished airing an anime season while the LN is still ongoing (at the time of writing this), having my same birthdate besides a tendency to forget stuff frequently and getting excited for lots of s*** in just like her, I knew I had to train a LoRA of her.

I screenshot her in almost every scene from all episodes of the anime adaptation (besides grabbing the usual official drawings and fan arts of her) in order to ensure she came out perfectly when training her and I think I made a job well done at that, I trained her with three costumes:

Her default one:

annette (boga), default, twintails, eyepatch, mini hat, black headwear, military uniform, black dress, epaulettes, long sleeves, buttons, frills, black boots

Lamplight school uniform:

annette (boga), eyepatch, twintails, lamplight, school uniform, pinafore dress, brown vest, white shirt, long sleeves, red bow, black socks, loafers

Her blue dress she wore in the 3rd episode of the anime (since I personally quite liked it a lot):

annette (boga), eyepatch, twintails, episode3, school uniform, blue dress, short sleeves, red bowtie, long skirt, pleated skirt

Her eyepatch isn't baked/pruned so you can generate her without it if you wish, if you still see it generated, try putting eyepatch tag in negative prompt.