One thing to keep in mind here is the amount of work required to manage a Twitter channel well. To keep a single channel fresh takes a lot of time. Trying to keep seven channels fresh (the six characters + the channel for the series) is going to be a ton of work. The last thing you want is for your social media channels to reflect poorly on the series. Social media channels that go dormant due to lack of resources never reflect well on a brand.

That being said, would it make more sense to roll all the characters under the nakedinfishbowl account?

If you choose to move forward with Twitter accounts for every character, I think I would opt for [CHARACTER NAME]_Fishbowl or [CHARACTER NAME]Fishbowl (Bonnie_Fishbowl or BonnieFishbowl, for example). Here is my reasoning:

1. NIAF is already owned and somewhat branded. You probably don't want people appending @NIAF to posts about your series.
2. [CHARACTER NAME]_Fishbowl or [CHARACTER NAME]Fishbowl is easy to remember.

Good luck! This is a tricky one...

For the benefit of others, I'm going to walk through how I would investigate this situation...

1. Head over to OSE and pull a backlink report to see if the link shows up (it doesn't)
2. Check links on Google Webmaster Tools and Bing Webmaster Tools

If the BBB link cannot be identified through those steps, move on to the following:

1. Verify the BBB page is indexed by searching the URL (it is indexed)
2. Verify the redirect is truly a 301 by visiting a header checking tool and entering URL. (yes, it is a 301 redirect)
3. Visit BBB and verify the following: a) the page is not being blocked from bots (it isn't) b) the link is followed (it is) c) the link can be crawled by bots (it can)
4. Visit the BBB robots.txt file to verify the page isn't blocked from bots (it isn't)

At this point, it's tough to determine exactly what is going on. I suppose I would consider building some links into said BBB page to 'assist' the bots in finding the page and capturing the link. Might be a good time to apply the ideas Pavel blogged about regarding SEO value from Q&A sites.

Best of luck!