Oliver and Holly are an ecologically-minded vegetarian couple who have raised their daughters to be as environmentally-aware as they are. As such, their house features a large garden, a row of bicycles for transportation, and a pair of recycling bins, they are the only family in Twinbrook to have it.
Jade, their teenage daughter, is the black sheep of the family, being the only member who not only eats meat but has no environmentally-themed traits whatsoever. She also seems to have a better aptitude with machines than her parents.
Emerald, their youngest daughter, is a vegetarian like her parents but shares her sister's interest in technology, especially computers.
The members of the Greenwood family all have a preference for shades of green. They are friends with the Prudence family.
Greenwood: Both 'green' and 'wood' are associated with nature and the environment. The Greenwoods' are named after green plants and minerals.
Oliver: "Kind one, peace, olive tree."
Holly: "Plant with red berries, holly grove."
Jade: A green gemstone which is also named greenstone and pounamu. Both Emerald and Jade have green gemstone names.
Emerald: A bright green gem. Jade and Emerald both have green gemstone names.