Hello i have as of now two Characters Eri Tenshi and Koneko Kiku i was logged in as Eri when i accidently without thinking replied  to a koneko thread though i wrote as koneko i was Eri on the site. iI wrote as koneko in a quick reply to let my writing buddy know is there anything else i can do ?

You could save your work by copying the text from your post into word or notepad and then delete your post, log into the correct account and repost it. But this would only work if the other has not replied yet. If they already replied, then don't worry about it and just be more careful in the future.