Michelle is the stunt double for Letitia Wright’s Shuri in Black Panther, and according to IMDB, will be reprising that role in Infinity War.
Shuri’s role in Infinity War won’t become clear until after the release of Black Panther, but this news would seem to confirm that Shuri will survive her MCU debut (which not all characters have).
Many fans are already looking even further than that however, with plenty of speculation about 2018’s Black Panther and the massive ensemble movie Avengers: Infinity War.
The eagle-eyed MCU Exchange noticed that the IMDB listing for Avengers: Infinity War includes Crystal Michelle as a stunt performer for the film.