![1girl albino bangs black_bow black_dress black_footwear black_hairband black_ribbon black_wings boots bow breasts closed_mouth colored_eyelashes cross cross-laced_clothes dress eyebrows_visible_through_hair feathered_wings flower frilled_sleeves frills full_body gothic_lolita grey_flower grey_rose hair_over_one_eye hairband inverted_cross juliet_sleeves lace lace-trimmed_hairband leg_lift light_particles light_rays lolita_fashion lolita_hairband long_hair long_sleeves looking_to_the_side nakukoroni pale_skin puffy_sleeves red_eyes ribbon ripples rose rozen_maiden see-through serious silver_hair sleeves_past_wrists small_breasts solo standing straight_hair suigintou sunbeam sunlight very_long_hair water white_dress wide_sleeves wings rating:s score:7 post #2542958](/cdn_image/preview/da/35/da354a70ce46bf72d1fbb32ec84ea2cd.jpg)
水銀灯 (Mercury Lamp), first of the Rozen Maiden dolls.
In an episode of the TV series, she makes a rather unusual remark when, while taunting the other dolls, she asks them if they are "taking their lactic acid bacteria" (in the form of probiotic drinks), implying that they are weak and that nutritional deficiencies might be the reason.
Since this joke sounds strange and out of character for her, fan artists have turned it into a meme.