萌拟人化指对非人类的动物、军事武器、国家或地区、交通工具、建筑物、操作系统、电脑软件、网站等依据其性质，把受仿物「描绘成具有与人相似的形体」和／或「演义或变卦成『具有智能的形体』且『可直接地或间接地表达若干原受仿物之特点属性与传奇』」形式的人型模样形容／设置／打扮，甚至籍Cosplay行为把该等角色扮演出来；属于二次创作甚至多次创作的其中一种手法。

由于少女的身体线条一般比男性或上年纪的女性拥有较强的曲线感，效果往往会较为可爱，容易使观众带出「萌」的感觉，故一般娘化，又称拟人化美少女或萌式拟人化少女成为了萌拟人化其中一个打动读者的通常目标。

Moe anthropomorphism(萌え擬人化,moe gijinka) is a form of anthropomorphism where moe qualities are given to non-human beings, objects, concepts, or phenomena. In addition to moe features, moe anthropomorphisms are also characterized by their accessories, which serve to emphasize their original forms before anthropomorphosis. The characters here, usually in a kind of cosplay, are drawn to represent an inanimate object or popular consumer product. Part of the humor of this personification comes from the personality ascribed to the character (often satirical) and the sheer arbitrariness of characterizing a variety of machines, objects, and even physical places as cute.