The sub-character from the late-90s visual novel With You, the “eternal little sister” who drove countless otaku mad despite not being a romance option.

https://vndb.org/v3687

Base1:

itou_noemi_ill, 1girl, purple eyes, purple hair, long hair, very long hair, ponytail, high ponytail, parted bangs, hair intakes, sidelocks, hair between eyes, hair bow, hair ribbon, yellow bow, yellow ribbon 

Base2:

itou_noemi_ill, 1girl, purple eyes, purple hair, long hair, very long hair, side ponytail, high side ponytail, parted bangs, hair intakes, sidelocks, hair between eyes, hair bow, hair ribbon, white bow, white ribbon 

Maid:

maid, waitress, dress, black dress, frills, long sleeves, puffy sleeves, white thighhighs, wrist cuffs

School Uniform:

school uniform, serafuku, sailor collar, white shirt, short sleeves, neckerchief, green neckerchief, pleated skirt, blue skirt

Casual:

dress, sundress, white dress, short sleeves, puffy sleeves