Reverend Wayne Te Kaawa, who is the moderator for the Presbyterian Church, led the service and referred to several scriptures including, "weeping may endure for the night but joy comes in the morning".
Mihinui's uncle, Peter Tamiana, said Mihinui had a message for her family and friends.
"Don't grieve for me. I've been called by the father. I've been called to go home ... Don't cry for me ... If I left a broken heart it's okay, we will meet again."
Mr Tamiana spoke of people having freedom of choice.
"Our favourite hobby is to point the finger at anyone else. It doesn't work like that ... Whatever choices you make they are yours, nobody else's."
About 100 Western Heights High School students sang He Honore as a tribute to Mihinui.
As the casket was conveyed to the hearse, students and others performed two haka.
Then Mihinui's body was taken to Pukepoto Urupa for burial.
Meanwhile, Rotorua police are continuing their investigation. Detective Senior Sergeant Zane Smith said they were yet to speak to some people, including a male who suffered burns in the fire and was in a stable condition in Waikato Hospital.
A friend of Mihinui said she believed a Molotov cocktail was thrown into the building. However, Mr Smith said yesterday they were yet to speak to anyone who saw any sort of firebomb used: "As of yet, there is no physical evidence that supports a Molotov cocktail being used."