Character Ganglöt from Fire Emblem Heroes.
Trigger Words: Ganglot, long hair, white hair, tiara, green eyes, black eyeshadow, see-through body, grey skin, black lipstick, skull, skelleton, choker, black dress, cleavage, frills, side slit, thigh boots,
You can try to add "holding weapon, scythe". "X-rays", "translucent skin", "ribcage visible through skin" and "ribcage" may sometimes be helpful. For NSFW add "purple nipples" "purple ass", etc.