You're welcome! The group isn't really active, it seems that nobody draws Robin anymore, but at least we have all the old art to look at.
it's okay but I'm actually a bit confused. at that time I draw Sena Robin and Miho Karasuma, but I'm confused how to upload it to deviant art?
I don't think I can help you there, better read the site help on submitting to Deviant art and to groups. Submissions to this group are automatically approved.