Medic option B from Etrian Odyssey IV (世界樹の迷宮4/SQ4), also known as "the glasses medic".
Use megamedi tag, purple hair, ponytail, glasses, purple eyes for ensuring basic look (I always use hair and eye tags even if unnecessary, you may not need them)
bare shoulders, sleeveless, plaid skirt, socks should work for her clothes.
Put belt in negatives if too many random straps appear, they are a type of FOE that appears randomly.
If the eyes look too wide open use sanpaku in negatives (adds to +2 cuteness too).
Improving it requires manual adjustment of training images to reinforce her canonical hair style and improve some details. Will do eventually, but no estimation of when.
Versions:
Prototype: Initial Pony version. Generally works but some details (number of straps, white top of socks, hair being symmetric instead of one side longer than the other) may come out wrong. Better used at about 0.9 strength.