Daniel Havili, whose interim name suppression lapsed today, pleaded guilty to the manslaughter of Vake and assaulting his brother, Ika Fake, with intent to injure him.
He appeared in the High Court at Auckland this morning before Justice Sally Fitzgerald. He was given a warning under the three strikes law.
His lawyer Louise Freyer said Havili wished to engage in restorative justice with the Vake family.
Siofilisi Paongo also appeared before Justice Fitzgerald via audio visual link as he admitted to a representative charge of assault with intent to injure and an additional charge of common assault.
Paongo was remanded on bail, and Havili in custody, until their sentencing in April.
The guilty pleas come months after co-defendant Ofa Folau was sentenced to home detention after admitting to his part in the attack.
One other man awaits trial for the allegations.
Fau Vake, whose full name is Lifau Tu'iha'aingana Vake, was with brother Ika Vake on Symonds St around 2.51am on May 16 when the confrontation occurred, according to court documents.
Fau Vake was known for training alongside New Zealand's top mixed martial arts fighters at City Kickboxing, but the brothers were outnumbered, authorities said. Fau Vake was taken off life support at Auckland City Hospital nine days after the incident.
Neither Folau nor Paongo was responsible for the blows that resulted in Fau Vake's death, authorities have made sure to point out. Paongo didn't punch Fau Vake at all, instead assaulting his brother, defence lawyer Nalesoni Tupou said.
The Vake brothers did not throw any punches themselves and were not the "aggressors", Crown lawyer Claire Paterson said during Folau's sentencing in August.
UFC fighter Dan Hooker was among those who attended the August hearing. He was among the many City Kickboxing members, including fellow UFC star Israel Adesanya, who have campaigned for stiffer sentences since Fau Vake's death.
Outside the courthouse, Hooker disparaged Folau's sentence as "an absolute joke".
