Judging by your statement, you're asking if Max and Anri bore a child what would he/she look like? Personally I would like to see a female Hero in a shining force game with a Joan of Arc like personality who kicks @$$ and takes names. Deanna unpromoted is a great choice for the base though if I ever take deep interest into art-designing and sprite I would rather draw that child baseless so he/she stands out.
I would also like for that child to have mixed hair color. Since Max has orange hair and Anri has white hair, maybe that child could have the hair be of mixed color. The eyes should be either similar to Max or Anri (take your pick).
Other than my thoughts, that's all I can deliver. Hope this helps you out there Wulfunruh.