Casting Marcela 13 Y Ethel 15 Y Better -

The protective yet competitive nature of siblings.

At ages 13 and 15, the transition from childhood to adolescence is rapid. Casting directors look for actors who can portray that specific vulnerability and emerging maturity naturally.

If Marcela and Ethel are being cast together, the "better" version of a tape is usually the one where the rapport between the two feels unscripted and genuine.