The liquor store was robbed about 7pm on Monday on Maraekakaho Road, Hastings.
Detective Senior Sergeant Dave de Lange said two males, aged 17 and 18, and a 15-year-old girl, have also been charged with aggravated robbery.
All four people arrested will be appearing in Hastings District Court today.
The 18-year-old, who is already facing an aggravated robbery charge, is now also charged with wounding with intent to cause grievous bodily harm.
A person working at the store sustained serious injuries during the robbery and is in Hawke's Bay Hospital in a stable condition.