The reason why I said that using the tabber to contain two different characters into single article is a bad idea is that, it would be difficult for newcomers to edits the articles.
Furthermore, it doesn't looks good in terms of design choice and modifying the tabber design would require you to edit the wiki's CSS (Cascading Style Sheets). It was so bad that I have to limit the uses of tabber to inside the infoboxes on my wikis.