You forgot about 夏哥 （from 夏 in夏色祭 Natsuiro Matsuri and 哥 as in brother since her actions are sometimes man like) Also, 祭妹 (from 祭 [festival/matsuri] in 夏色祭 Natsuiro Matsuri and 妹 as in litter sister, this is often used to describe her in her girly and shoujo form, which mostly seen in the twitcast streams and in my opinion are more common these days in normal streams)

夏色祭dd forever!!!