Cavalier Crystal owned Charlotte Opperman is an Irish Irish-bred Irish Sport Horse mare born in 2010. Bred by Thomas Horgan she is by Jack of Diamonds out of a mare by Cavalier Royale. She was initially produced by Alice Montgomery and Tiana Coudray and Harry took the ride in 2016 and has since been produced through the FEI levels by Harry. At the end of a successful season last year the pair was 3rd in its first 5* at Burghley.