Centaurs are a race of horse-humanoid beings with a special affinity for chemistry. Their skill with healing herbs, medications, chemicals, poultices, and more land them squarely in the people of the Sun – and also make them quite rich.
They’re fairly trustworthy, if humorless. Also, they do not give people rides; the back is for lovers and no one else. If you are to be carried by a centaur, it will be in his arms.