Mrs. Archer’s cousin. She and her husband, Mr. Henry van der Luyden, are two of the most powerful influences in society. However, they’re quite shy and they prefer to remain in seclusion at Skuyterkill, their estate on the Hudson. Louisa and her husband are very similar and always consult each other before making any decisions. They like Ellen and they help bring her into society when other families are snubbing her.