Multi Character → Chat Novel

Making it became a hassle. Or rather, can't you change the user's name anymore? It seems like you can't create one without entering the user's name from the start. Isn't this a downgrade? If you can't change the user's name, won't the immersion be lower? Or am I just not finding it, and can I change it somewhere? Does it mean we should play with the settings created by the creator, ignoring the persona?