Essential keywords: green hair, long hair, yellow eyes, bangs, breasts
Some suggested outfit keywords:
White bodysuit, straigtjacket, wide sleeves, long sleeves
White shorts, white boots, white crop top, Sleeveless white turtleneck, midriff, naval
Mini hat, top hat, twintails, choker, dress, black bow, thighhighs, Lolita fashion
Animal ears, ribbon, cat rears, striped sleeves, detached sleeves, argyle, paw pose
School uniform, red neck ribbon
Ashford academy school uniform, necktie, twintails, skirt
Choker, head bandana
Uniform, headset, ascot, earrings
Black dress, choker, flower, hair ornament
Detached sleeves, bare shoulders, dress
Something iconic: Holding pizza, eating
Some other keywords you may want to try: gun, weapon, cockpit, holding plush toy, barefoot, geass forehead mark, robot, mecha, symbol-shaped pupils, geass pupils