@00111 Inside the chapter itself, on the right hand side you have the "Comment speech bubble" between Hide Header and Report. Click that to be able to make the first comment.
One of the earlier raw chapters had a typo that made me think that she used Iris (airisu) as well during incognito, but the actual spelling for Alice was used everywhere elsewhere (arisu). We'll probably fix it at some point, but it's not a huge priority right now.