Yes, I'm pretty sure it's Monika. There are a lot of youtubers who got this while doing a playthrough of the game, if it's paused at the right time it's shown that it's Monika by her orange hair and white bow. I think the words aren't different then ones shown before, regardless of what word you pick there's a set chance (I think 1/11 each time a word is clicked?) of Monika's chibi.