How can I center this rather uneven parent node around its dashes?

My question is: given the tree in question, how can I centre its parent node around its dashes?

This is a sample of a much bigger, and complex, genealogical tree I am trying to build.

I would very much appreciate an answer.

You can find below the source code.

Thank you.

documentclass{standalone}

usepackage[edges]{forest}

begin{document}

begin{forest}
  forked edges, for tree={grow=north}
 [AAAAA --- BBB
    [A ]
    [B ]
    [C ]
    [D ]
    [E ] ]
end{forest}

end{document}

documentclass{standalone}
usepackage[edges]{forest}

begin{document}

begin{forest}
  forked edges, for tree={grow=north}
 [AAAAA --- BBBhphantom{BB}
    [A ]
    [B ]
    [C ]
    [D ]
    [E ] ]
end{forest}

end{document}