When Stranger Things was officially renewed for a second season earlier this week, it was also confirmed that its already large ensemble would be expanding. Now, we have some more detail into the backgrounds of three new characters in Season 2, which will launch on Netflix sometime in 2017.

According to The Hollywood Reporter, Hawkins is going to include characters named Max, Roman and Billy next year, with the first two tapped as series regulars. Read on for THR’s description of these characters, obtained in a casting breakdown:

“Max is a tough and confident 13-year-old female whose appearance, behavior and pursuits are more typical of boys than of girls in the era. She has a complicated history and a difficult relationship with her stepbrother, Billy, that's made her protective of her past and generally suspicious of those around her. She's also good on a skateboard, which she uses to get around pretty much everywhere.

Billy is a super muscular, overconfident 17-year-old. He's so captivating and edgy that there are rumors flying around that he killed someone at a school he attended in the past. Billy steals peoples' girlfriends, is a drinking-game pro and drives a black Camaro. But his violent and unpredictable nature shows itself to those closest to him, especially to ones who are younger than he is.

Roman, meanwhile, is described as a male or a female of any ethnicity between the ages of 30 and 38. After growing up homeless with a drug-addicted mother, he or she suffered a great loss at an early age and has been seeking revenge ever since. Roman is ultimately an outsider who doesn't understand how to connect with people.”

How will Max fit in with Mike, Lucas and Eleven? What about Billy and the high schoolers, Nancy and Jonathan? And what kind of impact will Roman make on Hopper, Joyce and the other adults? It’s worth noting that the first episode of Season 2 is presumed to be titled “Madmax,” so whoever Max is, she is likely to be mad. 

Stranger Things will resume filming this fall in Atlanta. Until then, hear the Back of the Class crew discuss the Netflix smash at the 32:30-mark in the episode below: