I'm not exactly familiar with the game and character, this is a test on how little training can get for good result. I found only 4 different official arts, which I then used to make 10 images for training. The result is pretty good for accuracy, but more prone to error and noise in my usual setup. Perhaps you'll get better result with different settings or models or by using upscaler.

Trigger word:

lucia_galuga

Outfit 1:

dark hair, high ponytail, long ponytail, blue combat suit, white combat vest, assault rifle

Outfit 2:

dark hair, long hair, loose hair, brown military uniform, glasses

May need to add (or not) for style:

western comic