Default apron appearance:

p4aika, short hair, blue hair, collared shirt, white shirt, short sleeves, apron, red apron, head scarf, hair ornament,

Non-apron appearance:

p4aika, short hair, blue hair, crown braid, hair ornament,

Other outfits:

track jacket, jacket,

japanese clothes, kimono, sash, obi, 

Aika Nakamura from the Persona 4 anime. She's mentioned a few times by name in the game but only makes an actual appearance in the anime.

Since she only appears in the anime it has a strong bias toward that style. The training data includes shots of her in a kimono & Yasogami High School track jacket, but there's not enough for them to really be considered proper "outfits".

For some reason it like to draw her really really short in full-body shots. You can mostly counteract this by adding long legs to the prompt.