> Also question, would you consider Tsukasa a tsundere?
No, not really. At least, not in the traditional sense. Maybe a <em>modern tsundere</em>, but I feel even that's a little bit of a stretch. She's not nearly violent/teasing/rude enough.
The only heroine in this show I feel could be called a tsundere is Kaoru. Even then, not really.
If there's a decently large number of people that want messages sent, I recommend Reditr which allows mass-sending messages. Otherwise you're going to be opening up a decent amount of tabs to send messages. :P Just keep the list of participants somewhere easily accessible to you without the /u/ and separated without commas. :) Like how I have for my Gintama watch