Orange County Superior Court Judge Derek G. Johnson set Royds' bail at $1 million.
Royds was arrested Thursday after police found the body of Monique Trepp packed in dry ice in a large Rubbermaid container in his hotel room. Police had obtained a warrant to search Royds' room for drugs.
An autopsy concluded that Trepp's death was not a homicide and Royds has not been charged with killing her. Toxicology reports were pending, but Dennis Conway, an Orange County assistant district attorney, said it appeared the 33-year-old died of an overdose.
Royds' court-appointed public defender, Richard Carmona, did not make himself available to reporters after the brief hearing and didn't immediately return a call for comment.
In addition to finding Trepp's body, investigators found drug paraphernalia, drugs and Christmas presents in Royds' room, Conway said.
Police and prosecutors have released few other details about the case, including how long Trepp's body was kept in the room. Conway said she had been dating Royds.
Royds has a prior drug conviction in Orange County in 2002, but did not appear for sentencing. Even if he were to post the $1 million bail on the new charges, he would be held with no bail on the older case, Conway said.