"Ayu” was released by BELL-DA in 1996. As far as I know, the heroine of this game is set only by name. To my surprise, there was no registration in VNDB, so I'll put a link to “Saya/Sumire” which was released the following year and used the same system for your reference.
https://vndb.org/v6106

Recommend strength is 0.7-1.0.
The default outfit is not complicated, but because of the layering elements, it cannot be generated exactly. And, the learning of the root of the antenna hair is incorrect.

default outfit:

ayu_bellda, 1girl, grey eyes, pink hair, long hair, drill hair, twin drills, bangs, parted bangs, ahoge, antenna hair, dress, collar, collared dress, white collar, long sleeves, puffy sleeves, skirt, blue skirt, white legwear, cuffed legwear, bow, bowtie, pink bow, brooch, jewelry

sailor:

ayu_bellda, 1girl, grey eyes, pink hair, long hair, drill hair, twin drills, bangs, parted bangs, ahoge, antenna hair, school uniform, serafuku, sailor collar, white collar, white sailor collar, pleated skirt, white skirt, white legwear, cuffed legwear, loafers