The 57-year-old rider is based in Surrey, but she was born in the USA and grew up on the Virgin Islands before moving to England as a teenager.
After achieving the Paralympic qualifying standard she had to drive the formation of a Virgin Islands Para-Equestrian committee that would enable her to participate at Greenwich Park - and then send out a plea for a horse.
'I qualified for London at Hartpury in Gloucestershire last year, but because the Virgin Islands had never been represented at the Paralympics there was no official committee,' she said.
A committee was formed, spearheaded by Virgin Islands Equestrian Federation President Regine Fritzner, before Frawley gained her London 2012 entry.
She will ride Rhapsody, a horse loaned to her by Para-Dressage rider Heather Bennett, in three Grade IV events.
She said: 'I only started riding him in late May, but he's a lovable clown who adores attention. He is an extrovert, and I think the huge setting of Greenwich will really suit him.'