History of Walking Upright Word Search Puzzle – Search Characters, Actors and Actresses. Word Search Puzzle Solver. Mi Na is a normal high school student who skatesboards to school every day and has an unacknowledged crush on family friend slash local tennis star Jong Min who is her fellow student. Also Mi Na has the superpower to turn invisible twice a day. Find out the following actor, actress, character names, and other movie-related words hidden in this word search puzzle based on this movie.. This includes identifying and searching for words that are related to : na, ji, hee, seok, Im Won, Kang Mi, Yang Hye, Lee Jini, Byeon Woo, Lee Min Ryung .