UPDATE: Read "about this version" for explanation of the changes, continue reading for prompts. Recommended weight 0.4-0.8 (describing the color of clothing elements is important at lower weights).

New Mystery/Heroes: catria_og, 1girl, solo, blue thighhighs, dress, blue elbow gloves, blue fingerless gloves, armor, headband, short dress, shoulder armor, pegasus knight uniform (fire emblem)

Valentian: catria_valentian, 1girl, solo, thighhighs, gloves, dress, boots, elbow gloves, white gloves, white dress, armor, headband, thigh boots, white footwear, shoulder armor, breastplate, pegasus knight uniform (fire emblem)

Echoes: catria_echoes, 1girl, solo, blue thighhighs, dress, bare shoulders, blue elbow gloves, belt, armor, zettai ryouiki, headband, short dress, breastplate

Spring: catria_easter, 1girl, solo, hair ornament, animal ears, cleavage, flower, elbow gloves, white gloves, hair flower, rabbit ears, headband, fake animal ears, blue thighhighs, pegasus knight uniform (fire emblem)

Below is for version 1

Catria from Fire Emblem, trained on animefull.

Tested at 0.4-1 weight, easter catria works with 1, but with the other ones starting low seems to produce better results. I had a small amount of images to work with for catria_echoes and catria_white so I apologize if those give consistency issues.

Highly recommend to add "(hair ornament, hair flower:1.2)" to your negative prompt if not generating easter catria as it has a tendency to add the flowers of her costume to other versions.

catria_nm for the first Fire Emblem Heroes Catria look

catria_easter for her bunny alt from Fire Emblem Heroes

catria_echoes for her Shadows of Valentia look

catria_white for the Fire Emblem Heroes alt costume that gives her white thighhighs

Check example images for the relevant tags that help get specific costumes more consistently.