This is Alisa from Monster Hunter anime God Eater series.

Her base prompt:

ge-4li54, long hair, blue eyes, grey hair,

Her outfit:

suspender skirt, pantyhose, suspenders, thigh boots, cabbie hat, fingerless gloves, thighhighs, elbow gloves, black footwear, armpits, medium breasts, navel, underboob, plaid skirt, midriff, black gloves, plaid headwear, single elbow glove, bare shoulders,

Her God Arc (weapon) in Blade form:

holding huge red blade,

Her God Arc (weapon) in Gun form:

holding huge red gun,