Alexander Koryagin:

AK> So it could be simply "Beauty and Beast"?

Not at all. One need only take a glance at the story "Beauty
and The Beast" to understand that the article usage  is  not
related  to  the  ungrammatical  conventions  of titles, but
reflects the usage in Beaumont's abridged version:

  https://www.pitt.edu/~dash/beauty.html

where the princess  is  called  Beauty  and  the  prince  is
referred  to  as both "the beast" and "Beast" -- by name and
by essense.

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