"I am aware that members of the victims' families are here and I acknowledge their presence," the judge said.
"(The accused) has not denied that charges and a family group conference will be held ... you are entitled to attend."
Judge Walsh said these conferences "are a very important part of the youth justice process".
He said he would not say too much about the FGC because a full process would be undertaken at the conference itself.
The judge told the accused: "It is important that you are upfront and honest with the participants.
"I know that will be stressful for you, and stressful for your mum and dad, and also for the victims' families. It is a tense time."
If an agreed outcome were reached at the conference, the court would need to take that into account, Judge Walsh said.
A psychological report ordered at the last appearance was now complete, and the judge said this "contains a lot of helpful insights into circumstances affecting you that have to be addressed at that conference".