Mature, grown-up, old enough (with the implication that one can look after oneself and make one's own decisions).
magnanimous, without arrogance or complaint, benevolently declining to raise controversy or insist on possible prerogatives.
benignant
indulgent, charming and graceful
compassionate
elegant and with good taste
kind and warmly courteous
full of grace
tactful
Expression of surprise, contempt, outrage, disgust, boredom, or frustration.