Nezuko is initially 12 years old in the manga. As the story unfolds, her age doesn't change significantly in a traditional sense, but her character development is quite remarkable.
First, get the right costume. Look for a bright yellow Pikachu onesie or make one yourself with yellow fabric and black accents for the ears, tail, and markings. Then, focus on the face. You can use yellow face paint to complete the look. Don't forget about Pikachu's rosy cheeks, which can be added with a bit of pink blush. Also, practice Pikachu's cute poses and expressions, like its shocked face or its happy hopping pose. This will make your cosplay more engaging and fun.
If the cosplayer traveled through the anime novels that they cosplayed, they might find some unexpected plots. For example, they might encounter their own characters and communicate with them. Or they might discover that something different was happening to their characters than they knew. In short, this kind of plot might surprise and excite them.
Cosplay is a form of art and self - expression. The idea of an 'erotic groped story' goes against the very essence of cosplay. Cosplayers put in a lot of effort into their costumes and portrayals, and the community promotes a friendly and safe environment. Such inappropriate stories are not in line with the values of the cosplay community which emphasizes respect for others, creativity, and enjoyment of fictional characters in a positive way.