The accused's mother and grandmother were in court yesterday but the deceased's family did not attend.
Police launched a homicide investigation after they were called about 12.20am on Sunday to a Snowdon Ave property in Moerewa where a party had been taking place.
They found an unresponsive 18-year-old with stab wounds. He died at the scene despite efforts to revive him.
The deceased was named by police as Krillan Koni Brown.
Detective Senior Sergeant Mark Dalzell said police still had a lot of work to do in the inquiry.
Once the interviews and forensic investigations had been concluded they would decide if there was sufficient evidence to lay further charges.
Police were not looking for anyone else, he said.
The victim in the male assaults female charge is believed to be related to the deceased.
About 20 people were thought to have been at the party when the incident occurred.