Despite, or perhaps because, of going by a pen name, YuruYuri author Namori is remarkably engaged with social media. In addition to her Pixiv page, she's a fairly regular Twitter user. This week, she had a nice treat for her followers, posting a picture of the younger, less outgoing version of the series' infamous Kyoko Toshino.
UPDATE - She's now posted an Akarin!
Also recently tweeted:
for Reimu Sanae Touhou doujinshi
Akkarin wind chime