NOTE
I didn't like the anime version of Cecily Campbell, so I tried to make it as close as possible to the original light novel.
If you want to add Cecily Campbell's weapons, add 'weapon, sword, sheath' to the prompt.
PROMPT
cecily campbell, short hair, headdress, red hair, red eyes, armor, cape, armored leotard, breastplate, single pauldron, brown gloves, detached sleeves, belt, white skirt, pelvic curtain, black thighhighs, knee boots, armored boots