I don't know about a character and I can't find anything about it. I did, however, find a way to do what you ultimately want, but it depends on the wiki having a clear category structure or tree (ie. all content pages (and categories) linking to one another through one category or another and peaking at one category at the top of the tree). To do this, first make a list using "Category (recursive)" which will make a list of every page connected to a category under the original category. Next, hit "Filter" and select the namespace(s) you are interested in being sure "Subject" is check. In the "Keep titles containing:" field, add your first word, and click "Apply." Repeat this process with your second term to narrow the list.
If the wiki doesn't have a strong, connected category system, I'd advice working on that before doing anything else as AWB is much easier (in my opinion) with one.