Each team will play six nonconference games.
The Terps are the highest-ranked team in the Big Ten.
Styles is the Terps' fourth new addition of the offseason.
The Big Ten hasn't given official word about when the season will start.
Charles, once expected to be a first round pick, slid to deep in the second last Friday.
During her four years in College Park, Charles was a three-time all-Big Ten first team selection.
Mikesell earned All-Big Ten honors in both her seasons with the Terps.
Robinson spent six seasons in College Park.
Over two years removed from tearing her ACL and meniscus in practice, Watson thrived with the Terps this past season.