Ma-Ti

From Captain Planet cartoon, Ma-Ti is the happy-go-lucky bearer of the Heart Ring and the last Planeteer to be summoned in the first episode. Ma-Ti is also the last Planeteer to call his element when calling Captain Planet. Despite being the youngest, he's usually the first to see reason and expose the truth to other Planeteers if they're lost or arguing.
He is an Indigenous youth (specifically identified with the Kayapo tribe in some materials) raised by a tribal shaman.