SALVE!
it seems quite
impossible to find a text about Marie. Few words in the Memories of her daughter La Grande Mademoiselle (but she did not knew her mother, so she said that she heard from her family - few things ...that Mary was brave and had a noble mind..) .
and not a single portraict of Marie on the web. (3 - 4 paintings are now in Versailles but not reproduced). There were a painting of the famous painter Pourbus... (who painted Henri IV, Marie de Medicis, etc... where is it ....?
Anyway I found her father and her mother :
her father : Henri de Bourbon , duc de Montpensier (1573-1608)
(the painter is Louis-Edouard Rioult (1790-1855), so the painting is an artefact, probably comissioned by the King Charles X of France from SOME ENGRAVING OF THE XVIth century (?):

her mother : Henriette-Catherine de Joyeuse , duchesse de Montpensier, then de Guise
(1585-1656).
It is an anonimous painting, painted aproximatively in 1612:

the fruit in her hands (the
grenade) indicates she is a widow (and had done a second mariage - in
1611- ).
and naturally we have so many paintings of her daughter La Grande Mademoiselle - on this one she was 18 or 19... but mainly she looks like her grandmother Catherine de Médicis on the paternal line:
Mr Canard